Shenzhen Youhong Technology Co., Ltd., also known as Jointcorp (J-Style), is a global pioneer in digital health wearable technology and medical device solutions. Established in 2004 and headquartered in Shenzhen, China, the company operates as a high-tech manufacturer and trading entity with a workforce of 301 to 500 employees. They specialize in the research, development, and production of smart wearable devices, including smart rings, smartwatches, fitness trackers, and chronic disease monitoring instruments. Their integrated digital health solutions leverage advanced biosensors, AI-driven algorithms, and cloud-based platforms for real-time biometric analysis.
The company maintains a robust manufacturing infrastructure across multiple facilities totaling 15,000 square meters, featuring in-house capabilities for molding, plastic injection, SMT, and final assembly. With a monthly production capacity exceeding 1,000,000 units, they provide comprehensive OEM and ODM services to global clients, including major brands like NTT Docomo, Honor, and Meizu. Their product portfolio extends beyond wearables to include smart electric toothbrushes, beauty care devices such as microdermabrasion machines, and medical-grade equipment like blood pressure monitors and sleep quality trackers.
Shenzhen Youhong Technology is committed to international quality standards, holding numerous certifications including ISO 9001, ISO 13485, ISO 14001, BSCI, SEDEX, FDA, CE, and FCC. With over 20 years of industry experience and a strong R&D focus supported by technical patents, the company exports its products to over 100 countries, with primary markets in North America and Europe.
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Shenzhen KY Intelligent Digital Ltd.
🇨🇳 China
2010201-300 peopleManufacturer/Trading Company
OEM manufacturer
ODM manufacturer
Product customization
Patented technology
Shipments
3
Key customer
ACCUTIME
Key market
Asia
Description
Shenzhen KY Intelligent Digital Ltd. (also known as Shenzhen KY Technology Co. Ltd) is a high-tech manufacturer and exporter specializing in the development and production of smart wearable devices and consumer electronics. Established in 2010 and headquartered in Shenzhen, China, the company operates a production facility ranging from 3,500 to 6,000 square meters, supported by a workforce of over 200 skilled personnel. The company is a recognized OEM and ODM partner for international brands such as Wal-Mart, Polaroid, and Blaupunkt, maintaining a monthly production capacity of up to 800,000 units.
Their core product portfolio focuses on smartwatches, fitness trackers, and smart bracelets, including specialized models like GPS kids' watches and heart rate monitors. Beyond wearables, the company manufactures tablet PCs, sports cameras, VR boxes, and connected health devices such as Bluetooth blood pressure monitors. Their R&D team integrates advanced technologies, including low-power chip design and sensor integration, while collaborating with major IC suppliers like Rockchip, MTK, and Allwinner.
Shenzhen KY Intelligent Digital Ltd. maintains a rigorous quality management system with certifications including ISO 9001, CE, FCC, RoHS, and SEDEX. With annual export values reaching up to USD 100 million, the company serves a global market across North America, Europe, Southeast Asia, and Africa. Their business model integrates research, design, and manufacturing to deliver high-end, fashionable digital products to the international B2B market.
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Shenzhen Vanssa Technology Limited Company
🇨🇳 China
202111-50 peopleManufacturer/Trading Company
OEM manufacturer
ODM manufacturer
Product customization
Key customer
DIALOG
Key market
South America
Review
4.6
Description
Shenzhen Vanssa Technology Limited Company is a professional manufacturer and trading company based in Shenzhen, China, specializing in the R&D, production, and marketing of smart wearable devices. With over 10 years of industry experience, the company operates a production facility exceeding 3,000 square meters and maintains a monthly production capacity of 500,000 units. Their extensive product portfolio includes smart watches, smart rings, smart bands, TWS earbuds, and AI smart glasses, featuring advanced functionalities such as ECG monitoring, blood glucose tracking, Bluetooth calling, and specialized safety features for children and the elderly.
As a technology-driven enterprise, the company employs a dedicated team of hardware and software engineers who provide comprehensive OEM and ODM services, including firmware support, app design, and OS/ID customization. They maintain strategic partnerships with leading technology providers such as Realtek, Nordic, and Jieli. To ensure high product standards, the company implements rigorous quality control protocols, including PCBA inspections, 8-hour aging tests, 100% waterproof testing, and 30,000-cycle key life tests. Their commitment to innovation is reflected in the release of 2-3 new models every season.
Shenzhen Vanssa Technology serves a global market and holds multiple international certifications, including CE, RoHS, FCC, BIS, KC, and UKCA, ensuring compliance with diverse regional standards.
Shenzhen Maxtop Digital Technology Co., Ltd. is a professional manufacturer and pioneer in the smart wearable industry, established in 2012 and based in Shenzhen, China. The company operates a 5,000-square-meter factory equipped with 9 production lines and a workforce of approximately 300 employees, including a robust R&D team of 150 engineers. Maxtop specializes in the design, production, and global distribution of smartwatches, smart bracelets, fitness trackers, and IoT-related devices, with an annual production capacity exceeding 3 million units.
As a comprehensive OEM and ODM service provider, the company offers extensive customization capabilities, including hardware design, software UI development, app customization, and private label packaging. Their diverse product portfolio features specialized lines such as kids' smartwatches, GPS trackers, smart rings, and smart audio glasses. Maxtop serves a prestigious global clientele, including major retailers like Walmart, Disney, Target, and MediaMarkt, and maintains a strong market presence across North America, Europe, and Asia.
Committed to high quality and technical innovation, Maxtop holds numerous patents and software copyrights. The company is ISO 9001:2008 certified and has passed rigorous audits by BSCI and Walmart. Their products meet international compliance standards, carrying CE, RoHS, FCC, BQB, and Prop65 certifications, ensuring reliability for electronics brand owners and health service providers worldwide.
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Eastern Gold Technology Co., Limited, also known as Shenzhen Gold-East Electronic Co., Ltd, is a prominent manufacturer and exporter of consumer electronics and smart wearables based in Shenzhen, China. Established in 2002, the company has over 20 years of industry expertise, specializing in the research, development, and production of smartwatches, smart bracelets, and innovative LED lighting solutions. Their diverse product portfolio includes GPS smartwatches, fitness monitors, AI glasses, smart rings, and a wide range of LED desk lamps and silicone crafts.
The company operates a robust manufacturing infrastructure featuring a 6,000-square-meter factory equipped with 18 production lines, high-speed automatic SMT machines, and specialized dust-free workshops. With a monthly production capacity of up to 300,000 units, they provide comprehensive OEM and ODM services, supported by a team of over 30 senior engineers and a creative design department. Their commitment to innovation is evidenced by more than 20 national and utility model patents, with approximately 80% of their smart wearables developed using proprietary molds.
Eastern Gold Technology maintains rigorous quality standards, holding ISO 9001:2015 and ISO 14001 certifications. Their products are compliant with international regulations including CE, RoHS, FCC, and REACH. The company serves a global clientele across more than 40 countries and regions, including North America, Europe, and South America, and has established supply relationships with major global brands such as Walmart, Samsung, Polaroid, and IBM.
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Shenzhen HCT Electronics Co., Ltd.
🇨🇳 China
2014201-300 peopleManufacturer/Trading Company
OEM manufacturer
ODM manufacturer
Own brand
Product customization
Shipments
7
Key customer
CHINA TELECOM
Key market
🇬🇧 United Kingdom
Description
Shenzhen HCT Electronics Co., Ltd. (also known as Shenzhen HLC Electronics Limited) is a private high-tech manufacturer and trading company established in 2014 in Shenzhen, China. The company specializes in the research, development, and production of smart wearable devices, wireless Bluetooth headsets, and tablet PCs. Its extensive product portfolio includes round and square screen smartwatches, fitness trackers, kids' smartwatches with SOS functions, TWS wireless earphones, and smart AI glasses. Additionally, the company operates a specialized division under the brand Maxen, which focuses on colorful TFT LCD displays, touch screens, and optical bonding modules for industrial automation and smart home applications.
Operating from production facilities totaling up to 18,000 square meters, the company maintains 100,000-level dust-free workshops and utilizes scientific JIT manufacturing methods. With a workforce of 201 to 300 employees, including a dedicated R&D team of engineers and technical specialists, the company boasts a monthly production capacity exceeding 1 million units. Shenzhen HCT Electronics is a verified supplier with ISO 9001 and CE certifications, offering comprehensive OEM, ODM, and SKD services, including custom app development and hardware branding.
The company has established a strong international presence, exporting 71% to 90% of its output to markets across Europe, Southeast Asia, North America, and the Middle East. Its professional capabilities have earned the trust of major global clients, including Xiaomi, Vivo, Walmart, and Michael Kors. By integrating advanced manufacturing equipment with stringent quality control processes, the company provides one-stop solutions for consumer electronics and industrial display needs.
Shenzhen Gold-East Electronic Co., Ltd
🇨🇳 China
1996301-500 peopleManufacturer/Trading Company
Established brand
OEM manufacturer
ODM manufacturer
Product customization
Shipments
21
Key customer
VIZIN INDIA
Key market
Europe
Description
Shenzhen Gold-East Electronic Co., Ltd. is a leading high-tech manufacturer and exporter of consumer electronics based in Shenzhen, China. Established in 2002, the company has grown into a comprehensive enterprise integrating research, development, manufacturing, and sales. Operating from a 6,000-square-meter facility with up to 18 production lines, the company employs between 300 and 500 staff, including a dedicated R&D team of over 30 senior engineers. Gold-East specializes in smart wearable technology, including smartwatches, smart bracelets, fitness trackers, smart glasses, and smart rings. Their diverse product portfolio also encompasses tablet PCs, laptops, and USB flash drives.
As a specialized OEM and ODM service provider, the company maintains a monthly production capacity of approximately 300,000 units and holds numerous national and provincial patents. Gold-East is recognized for its commitment to quality and social responsibility, holding certifications such as ISO 9001, ISO 14001, and SMETA (SEDEX). Their products comply with international standards including CE, RoHS, FCC, and REACH. With over 20 years of industry expertise, the company serves a global clientele across more than 40 countries, including major international retailers and brands such as Walmart, Target, Samsung, and Polaroid.
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Shenzhen Manridy Technology Co., Ltd.
🇨🇳 China
2014101-200 peopleManufacturer/Trading Company
OEM manufacturer
ODM manufacturer
Own brand
Product customization
Shipments
8
Key customer
HAMMER LIFESTYLE
Key market
Oceania
Description
Shenzhen Manridy Technology Co., Ltd. is a National High-tech Enterprise and ISO 9001-certified manufacturer specializing in the research, development, and production of smart wearable and health monitoring devices. Established in 2014 and based in Shenzhen, China, the company operates a production facility equipped with seven production lines, maintaining a monthly capacity of approximately 90,000 units. Their workforce includes over 120 skilled workers and a dedicated R&D team of more than 20 members holding over 60 patents and 70 software copyrights.
The company's extensive product portfolio is categorized into Smart Wearable, Smart Health, and Smart Home solutions. Core offerings include smartwatches with Bluetooth calling, fitness trackers, heart rate monitors, blood pressure and oxygen sensors, and specialized devices such as infrared thermometers, fingertip pulse oximeters, and smart rings. Notable innovations include the MF6, which integrates a smartwatch with TWS earphones, and various IP68-rated waterproof sports watches.
As a comprehensive B2B provider, Shenzhen Manridy Technology offers robust OEM, ODM, and contract manufacturing services, including SDK provision for software customization. Their business scale is supported by annual revenues between US$5 million and US$10 million, with a strong export presence in European and international markets. The company has established itself as a reliable partner for global brands, including Polaroid, by delivering high-quality electronic equipment and Class II medical device solutions.
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