J20 Mobile Phone Cooler for IOS Android with 3-speed Temperature Control and TEC Chip

Portable Back-clip Cooling Radiator J20 Mobile Gaming Accessories PUBG Game Cooler Semiconductor Cool Heat Sink for IOS Android
Product Introduction:
The J20 is a new semiconductor heat sink with a 3-speed temperature adjustable function, which can control the heat sink temperature at any time and protect the phone battery.

6 major upgrades:
1. Three temperature adjustable
2. Fast cooling
3. TEC chip technology
4. Low noise operation
5. Colorful lighting for esports
6. Compatible with various phone models

Product specifications:
Model Number:J20
Product Color:As Picture Show
Type-1 and Type-2 Material:ABS+Silicone
Type-3 Material:ABS+Silicone+Plating
Product Weight:About 60g
Product Size:57.5*mm37.5mm*84.5mm
Product Input:5V/2A Max
Product Power:9W Max
Product Type-1:Without Digital Display Function
Product Type-2:With Digital Display Function
Product Type-3:With Digital Display Function
Gears Number:3
Interface Type:Type-C
Compatible Phone Size:Between 68-89mm

Rainbuvvy is a vertically integrated smartwatch innovator based in China, operating both as the manufacturer behind global wearable brands and the creator of our own international smartwatch brand Rainbuvvy. With a dedicated team of 45+ engineers and industry specialists, we deliver OEM/ODM solutions, private label customization, and wholesale distribution for partners worldwide.

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Why Partner With Us?

Dual-Core Expertise
As both a brand owner and manufacturer, we understand market trends from dual perspectives:
Rainbuvvy Brand: Available on Amazon, eBay, Walmart.com, and regional e-commerce platforms across North America, Europe, and APAC.
B2B Solutions: 7+ years in R&D and bulk production of smartwatches with IP68/CE/FCC certifications.

Agile Customization
Negotiableunits for white-label orders with 45-day rapid turnaround
- Customizable hardware (watch faces, straps) & software (UI, health algorithms)
- Pre-loaded multi-language support for global markets

End-to-End Control
Ownership of the entire supply chain – from PCB design, mold development to quality assurance – ensures 30% faster prototyping and zero supply chain bottlenecks.

Data-Driven Innovation
Our Shenzhen-based lab continuously upgrades features based on 1.2M+ user data points collected from Rainbuvvy consumers, keeping your products ahead in:
▸ Health monitoring accuracy (heart rate, SpO2, sleep)
▸ Sports mode optimization (100+ activity profiles)
▸ Battery efficiency (up to 15 days per charge)

Global Footprint
• 20,000㎡ production facility with annual output of 800K+ units
• Serving 50+ distributors and brands across US, Germany, UAE, and Australia
• Warehouses in Los Angeles and Hamburg for faster regional delivery

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Your Next Step
Whether you're a startup seeking small-batch customization or an established retailer needing bulk supply, Rainbuvvy becomes your wearable tech arm.