Features:FASTER LASTING:The heated insoles for men rechargeable are made of latest carbon fiber heating material with type c cable, start warming in 5 seconds. This foot warmer insole is suitable for indoor and outdoor, motorcycle, trekking, skiing, fishing, camping, cycling, winter cold weather.RECHARGEABLE REMOTE:The built-in battery is a capacity of 2200mA, electric insole feet warmers can be fully charged within 3 hours. The heated insoles rechargeable has a working time of 3-6 hours, temperatures range of insole warmers are from 40C/104F to 65C/149F, The heated insoles for hunting boots are operated by a wireless heated remote control.SAFTY PROTECTION:Built-in temperature sensor and control chip, the heated boot insoles will stop heating automatically when the safe temperature is reached, the electric insoles have the arching effect of the arch, and it fits the foot type, the circuit and battery for heated foot warmers shoes protected by a steel case, able to carry about 250KG. The insole has tiny air holes for better heating conduction.TEMPERATURE SETTINGS:High setting up to 131, heating for 2-3 hours; Medium setting up to 122, heating for 3-4 hours; Low setting mode up to 113 heating for 4-6 hours.(Also depending on environmental conditions)