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At the forefront of groundbreaking innovation, Vontron Technology presents a pioneering fully automated membrane production line, meticulously crafted to perfection for unmatched efficiency. The seamless integration of ultrafiltration membrane and separation layer production is a testament to our unrivaled expertise. Innovatively launched in 2014, this state-of-the-art production line exemplifies excellence, expertly designed for flawless scraping and coating integration, setting new industry standards. With breakthrough speed control innovations, we've achieved an extraordinary production capacity surge, reaching an astounding 28,000 square meters daily-a nearly tenfold leap that redefines productivity and sets new benchmarks in the industry! By mastering the science of material and liquid distribution, Vontron has elevated membrane performance stability to unprecedented heights. Our sophisticated online detection system continuously monitors surface characteristics, ensuring real-time defect checks for unrivaled product quality and an exceptional qualification rate, making us a leader in membrane technology.
In the realm of membrane preparation technology, precise control over the morphology of the separated cortex structure is essential. This precision allows us to regulate membrane flux, optimizing surface leaf size and amplifying the specific surface area. Under standard testing, this process significantly enhances water flux, lowers operational pressure, and dramatically cuts costs, resulting in remarkable energy savings. Since 2005, Vontron Technology has stood at the forefront, leading China's technological advancements with ultra-low voltage high flux XLP membrane components that champion energy efficiency and performance..
Vontron Technology has perfected the art of controlling desalination layer thickness, advancing from 100nm to an impressive 300nm. This evolution not only ensures unmatched stability but also boosts chemical cleaning resistance, significantly extending the membrane's lifespan and durability.The PURO series, with its robust 300nm desalination layer, excels in high-frequency chemical cleanings within harsh wastewater environments like coking and steel industries, maintaining a stable removal rate and consistent water production.
To address diverse water quality demands, Vontron Technology has pioneered an innovative anti-pollution technology, introducing an interpenetrating network desalination layer structure with a groundbreaking four-layer membrane design.This cutting-edge advancement features a patented anti-pollution functional layer on the separation surface. Compared to traditional three-layer membranes, it significantly enhances hydrophilicity, charge, and surface roughness, reducing water flux decline from pollutants and microorganisms, and simplifying pollutant removal via washing and chemical soaking, thereby elevating cleaning efficiency and recovery capabilities, achieving outstanding anti-pollution effects and reliability.
Vontron Technology has also independently developed advanced membrane antioxidant technology, overcoming desalination layer oxidation challenges. Our membranes now boast an exceptional antioxidant capacity exceeding 30,000 mg/L • h, setting a new global performance benchmark that redefines the industry standards.
As we rapidly advance toward equipment automation, Vontron continues to break new ground in membrane element rolling technology, setting industry standards anew and pushing the boundaries of innovation.
Recently, our production process has achieved fully automated precision control, ensuring each component features accurately defined membrane areas, uniform configurations, and stable, reliable structures, enhancing overall productivity and quality..
With cutting-edge technologies like high-precision addressing and micro-control, our automated line has elevated the effective membrane area of the eight-inch element to a staggering 440 ft²-a 20.5% improvement over conventional products, showcasing our commitment to innovation and excellence. In 2017, Vontron Technology unveiled the high flux LP8040-510 model, showcasing a remarkable effective membrane area of 510 ft2 and an impressive water production flux of 14,000 GPD. By 2019, we optimized the effective membrane area of low-pressure eight-inch components to a maximum of 530 ft27eba17f3

| Type | Model | RejectionRate (%) | Permeate Flow GPD(m3/d) | Active Membrane Area ft2(m2) | Spacer Thickness(mil) | Test Conditions | ||
| Test Pressure psi(Mpa) | Solution Concentration of NaCl (ppm) | RecoveryRate (%) | ||||||
| Helixfil Series | LP400-LD | 99.7 | 10500(39.7) | 400(37.2) | 34-LD | 225(1.55) | 2000 | 15 |
| LP440-MAX | 99.7 | 12500(47.3) | 440(40.9) | 28 | ||||
| ULP400-LD | 99.5 | 10500(39.7) | 400(37.2) | 34-LD | 150(1.03) | 1500 | 15 | |
| ULP440-MAX | 99.5 | 12000(45.4) | 440(40.9) | 28 | ||||
| PURO-FRLE | 99.6 | 10500(39.7) | 400(37.2) | 34-LD | 150(1.03) | 2000 | 15 | |
| PURO-I | 99.75 | 10500(39.7) | 400(37.2) | 34 | 225(1.55) | 2000 | 15 | |
| PURO-II | 99.8 | 11500(43.5) | 400(37.2) | 34-LD | ||||
| ZERO Liquid Discharge Series | ZERO-FR10 | 99.7 | 11500(43.5) | 400(37.2) | 34 | 225(1.55) | 2000 | 15 |
| ZERO-HP70 | 99.75 | 8800(33.3) | 400(37.2) | 34 | 800(5.52) | 32000 | 8 | |
| ZERO-UHP120 | 99.7 | 7400(28.0) | 330(30.7) | 28 | ||||
| ZERO-XS90 | 99 | 8300(31.4) | 400(37.2) | 34 | 100(0.69) | 2000MgSO4 | 15 | |
| Ultra-pure Water Series | LE-8040UE | 99.5 | 11500(43.5) | 400(37.2) | 34 | 150(1.03) | 1500 | 15 |
| LE440-UE | 99-3 | 12000(45.4) | 440(40.9) | 28 | ||||
| PURO-UE | 99-6 | 11500(43.5) | 400(37.2) | 34 | 225(1.55) | 2000 | 15 | |
| Food and Beverage Applications Series | LP400-SP | 99-7 | 10500(39.7) | 400(37.2) | 34-LD | 225(1.55) | 2000 | 15 |
| ULP400-SP | 99-5 | 10500(39.7) | 400(37.2) | 34-LD | 150(1.03) | 1500 | ||
| VNF400-SPHL | 96-0 | 10500(39.7) | 400(37.2) | 28 | 70(0.48) | 2000MgSO4 | ||
| Type | Model | MWCO(Da) | Permeate Flow GPD(m3/d) | Active Membrane Area ft2(m2) | Spacer Thickness(mil) | Test Conditions | ||
| Test Pressure psi(Mpa) | Solution Concentration of NaCl (ppm) | RecoveryRate (%) | ||||||
| Food and Beverage Applications Series | VUF400-SP/2K | 2000 | 5000(20.8) | 400(37.2) | 31 | 60(0.41) | PEG2000 | 15 |
| VUF400-SP/6K | 6000 | 6500(24.6) | 400(37.2) | 31 | PEG6000 | |||
| VUF400-SP/10K | 10000 | 7000(26.5) | 400(37.2) | 31 | 40(0.28) | PEG10000 | ||
| VUF400-SP/20K | 20000 | 10500(39.7) | 400(37.2) | 31 | PEG20000 | |||
| Type | Model | RejectionRate (%) | Permeate Flow GPD(m3/d) | Active Membrane Area ft2(m2) | Spacer Thickness(mil) | Test Conditions | ||
| Test Pressure psi(Mpa) | Solution Concentration of NaCl (ppm) | Recovery Rate (%) | ||||||
| Extra Low Pressure Element | XLP12-8040 | 99.2 | 12800(48.4) | 400(37.2) | 28 | 100(0.69) | 500 | 15 |
| XLP11-4040 | 99.2 | 2600(9.8) | 100(9.3) | 28 | ||||
| Ultra Low Pressure Element | ULP22-8040 | 99 | 12100(45.8) | 400(37.2) | 28 | 150(1.03) | 1500 | 15 |
| ULP32-8040 | 99.5 | 10500(39.7) | 400(37.2) | 28 | ||||
| ULP32-8040/31 | 99.5 | 10500(39.7) | 400(37.2) | 31 | ||||
| ULP32-8040-440 | 99.3 | 12650(47.9) | 440(40.9) | 28 | ||||
| ULP21-4040 | 99.5 | 2600(9.8) | 100(9.3) | 28 | ||||
| ULP31-4040 | 99.6 | 2000(7.6) | 100(9.3) | 28 | ||||
| ULP21-4021 | 9g | 950(3.6) | 36(3.3) | 28 | 8 | |||
| ULP21-2521 | 99 | 300(1.1) | 14(1.3) | 28 | ||||
| ULP21-2540 | 99 | 750(2.8) | 30(2.8) | 28 | 15 | |||
| Low Pressure Element | LP22-8040 | 99.7 | 10500(39.7) | 400(37.2) | 28 | 225(1.55) | 2000 | 15 |
| LP22-8040/31 | 99.7 | 10500(39.7) | 400(37.2) | 31 | ||||
| LP22-8040-440 | 99.7 | 11500(43.5) | 440(40.9) | 28 | ||||
| LP22-8040PRO | 99.7 | 11000(41.6) | 400(37.2) | 28 | ||||
| LP21-4040 | 99.6 | 2800(10.6) | 100(9.3) | 28 | ||||
| Fouling Resistant Element | FR12-8040 | 99.5 | 10500(39.7) | 400(37.2) | 34 | 225(1.55) | 2000 | 15 |
| FR22-8040PRO | 99.7 | 11000(41.6) | 400(37.2) | 34 | ||||
| FR400-LD | 99.6 | 10500(39.7) | 400(37.2) | 34 | ||||
| FR11-4040 | 99.5 | 2200(8.3) | 90(8.4) | 34 | ||||
| High Oxidation Resistant Element | HOR22-8040 | 99.5 | 9000(34.0) | 400(37.2) | 28 | 225(1.55) | 2000 | 15 |
| HOR21-4040 | 99.5 | 2200(8.3) | 90(8.4) | 28 | ||||
| Heat Sanitizable RO Element | VHD-8040/34G | 98 | 9000(34.0) | 400(37.2) | 34 | 150(1.03) | 2000 | 15 |
| VHD-4038G | 98 | 2100(7.9) | 90(8.4) | 28 | ||||
| High Oxidation Resistant Element | HOR22-8040 | 99.5 | 9000(34.0) | 400(37.2) | 28 | 225(1.55) | 2000 | 15 |
| HOR21-4040 | 99.5 | 2200(8.3) | 90(8.4) | 28 | ||||
| Sea Water Desalination Element | SW8040XHR-400 | 99.85 | 6000(22.7) | 400(37.2) | 28 | 800(5.52) | 32000 | 8 |
| SW8040XHR-440 | 99.85 | 6600(25.0) | 440(40.9) | 28 | ||||
| SW8040FR-400 | 99.8 | 8200(31.0) | 400(37.2) | 34 | ||||
| SW8040HR-400 | 99.8 | 7500(28.4) | 400(37.2) | 28 | ||||
| SW8040HR-440 | 99.8 | 8250(31.2) | 440(40.9) | 28 | ||||
| SW8040LE-400 | 99.8 | 9000(34.0) | 400(37.2) | 28 | ||||
| SW8040LE-440 | 99.8 | 9500(35.9) | 440(40.9) | 28 | ||||
| SW8040XLE-400 | 99.7 | 11000(41.6) | 400(37.2) | 28 | ||||
| SW8040XLE-440 | 99.7 | 12100(45.8) | 440(40.9) | 28 | ||||
| SW4040HR | 99.8 | 1600(6-1) | 90(8.4) | 28 | ||||
| SW4040LE | 99.7 | 1900(7-2) | 90(8.4) | 28 | ||||
| SW11-4021 | 99.5 | 750(2.8) | 33(3.1) | 28 | 4 | |||
| SW11-2521 | 99.5 | 270(1.0) | 12(1.1) | 28 | ||||
| SW11-2540 | 99.5 | 600(2.3) | 28(2.6) | 28 | 8 | |||
| SW21-2540 | 99.7 | 800(3.0) | 28(2.6) | 28 | ||||
| Type | Model | RejectionRate (%) | Permeate Flow GPD(m3/d) | Spacer Thickness(mil) | Test Conditions | ||
| Test Pressure psi(Mpa) | Solution Concentration of NaCl (ppm) | RecoveryRate (%) | |||||
| Water Treatment Nanofiltration Membrane Element | VNF1-8040 | 98 | 10000(37.9) | 28 | 100(0.69) | 2000 MgSO4 | 15 |
| VNF2-8040 | 97 | 10500(39.7) | 28 | ||||
| VNF1-4040 | 98 | 2000(7.5) | 28 | ||||
| VNF2-4040 | 97 | 2400(9.1) | 28 | ||||
| VNF1-2540 | 98 | 650(2.46) | 28 | ||||
| VNF2-2540 | 97 | 750(2.84) | 28 | ||||
| Municipal Water Nanofiltration Membrane Element | TAPU-LS | 95 | 12000(45.4) | 34-LD | 70(0.48) | Tested in mixed solution of NaCl,MgSO4 and CaCl2 | 15 |
| TAPU-MS | 95 | 9000(34.1) | 34-LD | ||||
| TAPU-HS | 95 | 8000(30.3) | 34-LD | ||||
| TAPU4040-LS | 95 | 2200(8.3) | 34-LD | ||||
| TAPU4040-MS | 95 | 2000(7.6) | 34 | ||||
| TAPU4040-HS | 95 | 1700(6.4) | 34-LD | ||||
| Material Separation NFMembrane Element | MASE-SP | 90 | 12000(45.4) | 34-LD | 100(0.69) | 2000 MgSO4 | 15 |
| MASE-SL | 98 | 12000(45.4) | 34-LD | ||||
| MASE-PS | 98 | 12000(45.4) | 34-LD | ||||
| MASE-CR | 95 | 12000(45.4) | 34-LD | ||||
| High Pressure Nanofiltration Membrane Element | MASE-SL 80 | 98 | 8200(31.0) | 28 | 100(0.69) | 2000 MgSO4 | 15 |
| MASE-CR 80 | 95 | 9500(35.9) | 28 | ||||
| Acid-resistant Nanofiltration Membrane Element | Acidstab NF-8040 | 96 | 5500(20.8) | 28 | 110(0.76) | 2000 MgSO4 | 15 |
| Acidstab NF-4040 | 96 | 1200(4.5) | 28 | ||||
| Acidstab NF-2540 | 96 | 350(13.0) | 28 | ||||
| Alkali-resistant Nanofiltration Membrane Element | Alkalistab NF-8040 | 96 | 5500(20.8) | 28 | 110(0.76) | 2000 MgSO4 | 15 |
| Alkalistab NF-4040 | 96 | 750(2.8) | 28 | ||||
| Alkalistab NF-2540 | 96 | 220(0.82) | 28 | ||||
| Type | Model | Permeate Flow GPD(m3/d) | Testing Pressure psi(MPa) | Test Solution | Solution Concentration(ppm) | Recovery Rate (%) |
| Spiral Wound Ultrafiltration Membrane Element | VUF8040-4K/31F | 8700(32.9) | 60(0.41) | PEG 4000 | 1000 | 15 |
| VUF8040-6K/31F | 6500(24.6) | PEG 6000 | ||||
| VUF8040-8K/31F | 9500(35.9) | PEG 8000 | ||||
| VUF8040-10K/31F | 7000(26.5) | 40(0.28) | PEG 10000 | 1000 | ||
| VUF8040-20K/31F | 10500(39.7) | PEG 20000 | ||||
| VUF8040-67K/31F | 25000(94.6) | 40(0.28) | BSA | 300 |
| Type | Model | Active Membrane Area(m2) | Weight(Kg) | WxHxT (mm) | Average Membrane Pore Size (µm) |
| Flat Ultrafiltration Membrane Element | VMR 88 | 0.88 | 2.34 | 490*1000*7 | 0.1 |
| VMR 160 | 1.6 | 3.73 | 515*1750*7 | 0.1 |
| Type | Model | Active Membrane Area(m2) | System fluxLMH | Nominal Aperture µm | Membrane filament material | Manufacturing Technique |
| Hollow Fiber UF Membrane Element | VUF-2860 | 51 | 30-120 | 0.02 | PVDF | NIPS |
| VUF-2880 | 77 | 30-120 | 0.02 | PVDF | NIPS | |
| VUF-2860T | 51 | 35-120 | 0.08 | PVDF | NIPS | |
| VUF-2880T | 77 | 35-120 | 0.08 | PVDF | NIPS |
| Type | Model | Permeate Flow GPD (m³/d) | Rejection Rate(%) | Min. Rejection(%) | Testing Conditions | Product Size mm | |||
| Pressure psi(Mpa) | Concentration of NaCl(ppm) | Recovery(%) | Length | Diameter | |||||
| HP Series | HP1812-50 | 50 (0.19) | 99 | 98 | 60(0.41) | 250 | 60 | 298 | 46 |
| HP1812-80 | 80 (0.30) | 99 | 98 | 46 | |||||
| HP2012-100 | 100(0.38) | 98 | 97 | 48 | |||||
| HP3012-400 | 400(1.51) | 98 | 97 | 100(0.69) | 73 | ||||
| HP3012-600 | 600(2.27) | 98 | 97 | 73 | |||||
| High TDS Series Mempro | HT3-1812-80 | 80 (0.30) | 98.5 | 97.5 | 60(0.41) | 250 | 15 | 298 | 46 |
| HT3-2012-100 | 100(0.38) | 98 | 97 | 48 | |||||
| HT3-2012-150 | 150(0.56) | 98 | 97 | 48 | |||||
| Mempro Series | M80 | 80 (0.30) | 98 | 96 | 80(0.55) | 250 | 15 | 298 | 44 |
| M100 | 100(0.38) | 98.5 | 96.5 | 80(0.55) | 46 | ||||
| ULP Series | ULP1810-75 | 75(0.28) | 98 | 96 | 60(0.41) | 250 | 15 | 256 | 44 |
| ULP1810-75 | 80(0.3) | 98 | 96 | 47.5 | |||||
| ULP Series | ULP2010-100 | 100(0.38) | 98 | 96 | 60(0.41) | 250 | 15 | 256 | 47.5 |
| ULP1812-50 | 50(0.19) | 99 | 97 | 60(0.41) | 298 | 46 | |||
| ULP1812-75 | 75(0.28) | 98 | 96 | 60(0.41) | 46 | ||||
| ULP2012-100 | 100(0.38) | 99 | 97 | 60(0.41) | 48 | ||||
| ULP2012-125 | 125(0.48) | 99 | 97 | 60(0.41) | 48 | ||||
| ULP2812-200 | 200(0.76) | 94 | 94 | 100(0.69) | 55 | 68 | |||
| ULP2812-300 | 300(1.13) | 98.5 | 96.5 | 60(0.41) | 15 | 68 | |||
| ULP3012-300 | 300(1.13) | 98.5 | 96.5 | 100(0.69) | 40 | 73 | |||
| ULP3012-400 | 400(1.51) | 98.5 | 96.5 | 73 | |||||
| ULP3012-500 | 500(1.89) | 98 | 96 | 50 | 73 | ||||
| ULP3012-600 | 600(2.27) | 98 | 96 | 73 | |||||
| ULP3012-800 | 800(3.02) | 97 | 95 | 73 | |||||
| ULP3013-400 | 400(1.51) | 98.5 | 97.6 | 40 | 333 | 67.8 | |||
| ULP3013-500 | 500(1.89) | 98 | 96 | 50 | 333 | 67.8 | |||
| ULP3013-600 | 600(2.27) | 98 | 96 | 67.8 | |||||
| ULP3013-800 | 800(3.02) | 97 | 95 | 67.8 | |||||
| ULP3113-800 | 800(3.02) | 98 | 96 | 78 | |||||
| ULP3113-1000 | 1000(3.78) | 98 | 96 | 78 | |||||
| ULP3413-1200 | 1200(4.54) | 90 | 90 | 100(0.69) | 55 | 88 | |||
| HOR Series | HOR2012-50 | 50(0.19) | 98 | 96 | 60 (0.41) | 250 | 15 | 298 | 48 |
| Type | Model | Permeate Flow GPD (m³/d) | Solution Concentration | Recovery(%) | Product Size mm | |
| Length | Diameter | |||||
| NF Series | VNF-1812 | 100(0.38) | NaCI CaCl2 | 30±10 85 | 298 | 46 |
| VNF-2012 | 120(0.45) | NaCI CaCl2 | 30±10 85 | 48 | ||
| VNF-3012 | 400(1.51) | NaCI CaCl2 | 30±10 85 | 73 | ||
| VNF-3013-1000 | NaCI CaCl2 | 30±10 85 | ||||
With an illustrious legacy spanning over two decades, Beijing Tongchuang Fulai Science and Technology Development Co., Ltd. stands as a beacon of innovation and excellence in the water filtration industry. Our dedicated team has meticulously honed their skills in research, development, and manufacturing to offer supreme water filtration solutions, ensuring purity and unmatched reliability for all your needs.
Our remarkable Vontron RO Membrane is more than just a product; it is a hallmark of unparalleled quality and efficiency. Celebrated and trusted across a vast expanse of over 130 countries and regions, this membrane underscores our unwavering commitment to global standards of excellence and reliability.
Become a part of the elite community of over 7,000 discerning customers who have placed their trust in VONTRON, the quintessential choice for outstanding water filtration systems. Experience the pinnacle of quality and service that have set us apart as the industry's preferred partner, ensuring that your water is as pure as your expectations.




Since its inception in 2003, Beijing Tongchuang Fulai Science and Technology Development Co., Ltd. has consistently been at the forefront of the water treatment sector. Distinguished for our unwavering commitment to pioneering research, meticulous manufacturing, and strategic sales expertise, we have become a beacon of innovation in the industry. Our impressive array of state-of-the-art water treatment equipment and accessories has set the gold standard, resonating throughout the industry. As a leading wholesaler and trusted stockist, we have forged robust partnerships with both domestic and international water treatment giants, solidifying our legacy of exceptional excellence and trust. Our expertise encompasses the entire spectrum of customized solutions, seamlessly integrating conceptual design with the precise assembly and meticulous debugging of advanced automated softening water equipment and sophisticated reverse osmosis pure water systems. We are devoted to exceeding the unique requirements of our clients, consistently delivering service excellence that is unmatched..
Boasting an expansive 18,000 square meters of warehouse capacity, our company is a standout leader in the water treatment domain. Celebrated for our robust inventory capabilities and exemplary, rapid after-sales service, reliability is the bedrock of our operations. We are passionately committed to offering unparalleled solutions to our valued clients, ensuring their complete satisfaction with every interaction.



1. Who are we?
Our company was founded in 2003 and is headquartered in Beijing, China.
We have a total of 18000 square meters of warehouses across China, making us the most comprehensive and largest inventory water treatment accessory supplier in China. We provide you with one-stop procurement and offer you more optimized purchasing advice. For over 20 years, we have won a good reputation in the water treatment industry with sufficient inventory and timely after-sales service!
2.How can we guarantee quality?
To guarantee quality, we take the following measures:
First, we strictly select cooperative manufacturers. All our partner factories are well-known domestic and international enterprises with complete and certified quality management systems (such as ISO 9001), ensuring standardized production processes.
Second, we implement rigorous quality inspection. Both incoming materials from suppliers and finished products undergo multi-stage inspections to meet industry standards and customer requirements.
Third, we provide comprehensive after-sales support. We offer quality warranties and timely technical services to resolve any issues promptly, ensuring customer satisfaction with our products.
This approach combines strict supplier selection, systematic inspections, and strong after-sales support to ensure the high quality of our water treatment accessories.
3.What can you buy from us?
The pre-treatment system, ultrafiltration system, RO membrane element, ultrapure water system, dosing device, softened water system(Raw water tank, raw water pump, sand filtration device, carbon filtration device, softening device, various filter materials, precision filters, control valves, salt tanks, medicine tanks, metering pumps, flow meters, ultrafiltration filters, RO membrane elements, membrane shells, EDI modules, etc.) and related accessories involved in the reverse osmosis water treatment system are all in stock.
4.Why choose us instead of other suppliers?
Company advantages: a leading enterprise in the water treatment accessories industry, with a national warehouse of 18000 square meters, complete product categories, and spot supply, shortening the procurement cycle, and offering discounts for bulk purchases.
One stop service capability: Unlike single category suppliers, we integrate full chain products such as pretreatment, ultrafiltration, and ultrapure water systems. Our 15 year experienced procurement consulting team provides cost optimization solutions, which can help customers reduce their overall procurement costs by an average of 15% -20%.
Quality assurance: Strictly select ISO certified manufacturers, implement a 5-level quality inspection process from raw material warehousing to finished product outbound, and have zero major quality accident records for over 20 years.
Full cycle service guarantee: The industry's first"7 × 12 hour after-sales online response mechanism"provides free technical support during the warranty period, and has solved installation, debugging, system maintenance and other problems for over 3000 customers, with a customer repurchase rate of 89%.
5.What services can we provide?
-Delivery method: Supports flexible terms such as FOB, CFR, CIF, EXW, DDP, and express delivery.
-Payment currencies: USD, EUR, JPY, CAD, AUD and other multi currency settlements.
-Value added services:
-Technical support: Provide guidance on system design, installation, debugging, and maintenance.
-Customized service: Non standard accessories or complete solutions can be customized according to needs.
-After sales guarantee: Free repair/replacement during the product warranty period, 7 × 12 hours online response.