Feature: 1. Multifunctional: warm up a wide range of feet to improve cold feet, the heat of carbon fiber material, effectively stimulate blood circulation, help resist cold weather. 2. Mesh upper: Sweat-wicking and breathable mesh, the insole is designed with a mesh upper to fit your foot and absorb sweat. 3. Flexibility: Lightweight and soft insole to protect the environment with flexibility and cushioning softness to improve the texture of walking. 4. Three levels of regulation: high temperature, average temperature and low temperature, with the perception of heat and cold by the body to adapt to a comfortable position, but also improve blood microcirculation, blood circulation, activation, promote metabolism. 5. Charging: fast charging, long use time, charging 4 hours, using 10 hours, provides more convenience, allows for more convenient use. Specification: Item Type: Heated Inserts Material: microfiber cloth Insert battery: 2 x 2100mah lithium polymer batteries (included) Remote control battery: 1 x 23A 50mah battery (included) Voltage: 3,7 V Charging voltage: 3,0 V-4,2 V Output: direct current 4,2 V-5 V 500 x 2 Output Power: 98% Level: high temperature, medium temperature, low temperature Charge: 4 hours charging, 10 hours use When switched on, remote control temperature control operation: 1. Press H key for 3 seconds, enter high temperature mode, temperature between 50-60 degrees, LED is always on; 2. Press and hold the M key for 3 seconds to go to medium temperature mode, the temperature is between 40-50 degrees (first 10 minutes. After 10 minutes. As above 3. Press and hold the L key for 3 seconds to enter low temperature mode, temperature between 35-40 degrees (10 minutes before and 10 minutes after). As above, 4. Press the heart key, the LEDs slowly flash, stop the heating, enter standby mode (the remote control cannot turn on and off) List of packages: 1 x pair of shoe inserts 1 x USB data cable 1 x Remote Control 1 x User Manual Key operation on the insert: 1. After inserting the insole into the shoe, press and hold the on button for 2 seconds, the LED indicator will start flashing slowly (the remote control only works when the insert is turned on) 2. Press the button on the insert to adjust the temperature in three cycles when turned on: Press the first button,to go into low temperature mode, about 40 ,first 10 minutes of high temperature mode, 55 fast heating,green light is always on, 10 minutes later the green light flashes,officially enter the medium temperature mode, about 40 ,Press the second button to go into medium temperature mode,about 50 , the first 10 minutes of high temperature mode,55 fast heating, green light is always on,10 minutes later the green light flashes, officially enter low temperature mode,about 50 Press the third button to go into high temperature mode,55, the green light is always on; press the fourth time. Return to standby mode, stop heating, flashes green light Press the fifth time to go back to low temperature mode. 3. Shutdown operation: in the on state, press and hold the button for 2 seconds, the LED indicator will go out, the shutdown will succeed, the remote control operation is incorrect.