Say goodbye to cold feet. This premium heated insole features a rubber heating element with a large heating area and even heat distribution.Keep your feet warm—this rechargeable battery-powered heated insole effectively solves foot discomfort in cold weather. Keep your feet active during winter outdoor activities such as hunting, skiing, motorcycling, hiking, or trekking. Simple and easy to use. Product 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 Capacity: 2100mAh 5. Heating Pad: 10*6cm; Load Impedance: 8 ohms 6. Operating Discharge Time: High Temperature: 4 hours 30 minutes, approx. 55℃ Medium Temperature (75 ): 6 hours, approx. 50℃ Low Temperature (40 ): 9 hours, approx. 40°C Shoe Sizes: S (35-40); L (41-46) 1 Dual Heated Insole 1 1 remote control1 charging cable1 English instruction manualColor:BLACKMaterial: Mesh + RubberPackage Contents:2 insoles + 1 Type-C power cord + 1 remote control + 1 instruction manualThis package only includes the above contents; other products are not included.Note: Light reflection and different monitors may cause the color of the item in the picture to be slightly different from the actual product. Measurement error is +/- 1-3 cm.