1. Keep warm in winter: keep warm in winter, prevent cold and frost 2. Can be cut: There are yardage cutting lines on the surface, which can be cut into the required size according to the needs, and the arch is more suitable and comfortable. 3. Temperatureremote control: a temperature remote control device is designed, different buttons on the remote control are used to control different operation modes, and the temperature can be controlled according to your own needs. 4. Battery power supply: Built-inlithium battery, can be used when fully charged, no need to tie the battery, no need to connect the power supply. 5. Good for health: release far infrared rays when heated, promote blood circulation, prevent frostbite, regulate menstruation and bloodcirculation, relieve fatigue, etc.Instructions for use of insoles: 1. Press and hold the switch for 3 seconds, the LED indicator lights up, and the red light lights up, indicating high temperature. 2. Click again, the blue LED light is on, indicatingthe medium temperature. 3. Click again, the green LED light is on, indicating low temperature. 4. Press the power button on the remote control to power off.Remote control operation: 1. Press H/ON on the remote control to turn on the high temperature.2. Press the remote control M to open the medium temperature 3. Press L on the remote control to turn on the low temperature. 4. Press the power button on the remote control to power off. Specifications: Name: Electric Insole Material: EVA Voltage:3.7V Battery Capacity: 2100 mA Charging Voltage: 3V-5V Power Output Efficiency: 98% Overcharge Protection Voltage: 5V Overvoltage Protection Voltage: 2.85V Charging Method: USB Charging Size: 35-40 euros, 41-46 euros. Temperature adjustment: 2-3.5hours (53 60-60) in high temperature mode, 3.5-5.5 hours (48--52 hours) in medium temperature mode - 5.5-9 hours (40-50) in low temperature mode (depending on environmental conditions) depending on). The usage time is about 6-7 hours. Packing List:1x Heated Insole 1x Remote Control 1x USB Charging Cable "All our products have undergone strict quality inspection. If there is any quality problem or you are not satisfied with the product, please contact us. We will provide you with the best solution.