No more cold feet. premium-quality heated insoles with rubber heating element, large heating area, even heat distribution. Keep Your Feet Warm - Rechargeable battery heated insole can solve your foot discomfort in cold weather. Keep you active in certain winter activities such as hunting, skiing, motorcycle, mountain climbing or walking etc. Simple operation Easy to do. Features: 1. Charging Voltage: 5V/1A Charging Current: 400mA, 7.4WH 2. Discharge Current: High: 4.2V/547mA, 3.85V/505mA 3. Operating Voltage: 3.85V/4.2V 4.Battery and Control Module, Battery: 2100mAh 5. Heating Mat: 10*6cm, Load Impedance: 8 ohms 6. Operating Discharge Time: High Temperature (100%): 4 hours and 30 minutes, approximately 55°C Medium Temperature (75%): 6 hours, approximately 50°C Low Temperature (40%): 9 hours, approximately 40°C Shoe size Code 35-40 1 pair X heating insole 1 X remote control 1 X Charging Cable 1 X English manual Color: As shown Material: Mesh Fabric + Rubber Package Contents: Insoles*2+Type-C power cable*1+Remote control*1+Instruction manual*1 Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.