Product Name: Heating Insole (Remote Control) Material: plastic plus carbon fiber Product size (cm): 26*9*5cm Weight (kg): Including color box Packing weight: 350g Voltage: 3.0V-4.2V Battery capacity: 2100mAh Input: AC/100-240V40-60Hz Output: DC/4.2V-5V 500*2 High temperature: 55 degrees Use time: 4 hours Medium temperature: 50 degrees use time 6 hours Low temperature: 40 degrees use time 10 hours 1. Improve the coldness of the feet, the carbon fiber material heats up, effectively stimulates the blood circulation of the feet, and helps resist the cold weather 2. Fast charging time, charging for 4 hours and using for 10 hours. 3. It is suitable for people who work outdoors, must travel in severe winter, and people who are old and afraid of cold. Product list: one pair with built-in battery, one remote control, one double-ended USB charging cable, OPP with packaging Instructions Button operation on the insole 1. Before putting in the insole, press and hold the key for 3 seconds, the LED indicator light will be on, and the red light will be turned on, indicating high temperature. 2. Press again, the LED blue light is on, indicating medium temperature. 3. Press again, the LED green light is on, indicating low temperature. Click to cycle red, blue, and green lights, adjust in three gears of high, medium and low temperature, and press and hold for three seconds to shut down.