USB Plug-in Heat Insole Foot Warmers Pluggable Rechargeable Treasure Computer Power Socket Washable And Cuttable Features: 1.Heated Insoles: The heated insoles are made of, soft heated insoles with, with heating wire, the preheating system heats up slowly, even heat distribution. 2.USB Interface Heater: Put the soles on your shoes and connect them to the power supply to enjoy the heat. heating, large heating, even heat distribution, no more cold feet! 3.Safe and Reliable: Energy-saving, low-voltage, safe and energy-saving protection. The warm-up depends on the choice of batteries! For better heating function, we recommend using 2000 mAh batteries. Stable heating, guaranteed safe. 4.Washable and Reusable: The heating soles can be cleaned. Dry it before use. You can with water to recycle it, but keep the interface away from water when connecting the USB power. 5.Applications: USB templates for men and women, for skiing and other snow sports. personnel, against the cold at home, outdoor cycling, work in the open.Ideal for all types of shoes and boots. Specifications: Color: Black Function: Foot Warmer Applicable Gender: Unisex Voltage: 5V 2A 3 of temperature control: first 45C, second 50C, third 55C Note: Please select the output as 5V 2A interface. If it is 5V 1A, the temperature will be relatively low. It is not recommended. Note: 1. Due to Manual Measurement, Please Allow a Difference of 1-3CM. 2. Due to the Difference of Light and Screen, The Color of This Item May Be Slightly Different from the Picture. Packing include: 1 Pair X Heated Insoles 1 X USB Cable