KC-I003 System Composition -- battery insoles A pair of insoles with heating element inside A pair of calf wraps to fix the insoles. Two Li-Polymer batteries included Battery charger with split head (CE approved) Technical Data -- battery insoles 1.Charger input voltage AC100~240V 50/60HZ 2.Li-on battery pack voltage 7.4V/1900mAh 3.Heated insoles input power 2 W(MAX) Working Time Type--KC-I003 Working time 6 HOURS (high rank) 8 hours(low rank) temperature 55 degree (high rank) 45 degree (low rank) Charging time 5 HOURS Battery charge -- battery insoles 1. The charger can charge one or two Li-on batteries at the same time with the split head. When the battery is being charged, the indication light will shine red. When the battery has been charged full, the indication light will flash green. When the battery has been charged full, it will shine green. 2. Before using the insoles, please charge the battery full and that will take you around 4-5 hours. Installation steps -- battery insoles 1. Check the parts and cut the insoles to fit the size of your feet. Be careful not to cut the wire or the heating element inside the heating zone. Then put the heating mat into your shoes (with the word side downwards) 2. Fix the battery with the clip onto the surface of the shoes or fit it onto the wrap around your calf. 3. Insert the DC plug on the insoles into the DC socket on the battery. Then press the on key to start the power. To open the focus lamp on the battery, just press the up key on the battery continuously for 2 seconds and the focus lamp will shine. To close the power, just press the off key on the battery continuously for 2 seconds. Show More