Bullet Points:1Environmentally Friendly Materials: Safe and environmentally friendly materials, the latest high-efficiency carbon fiber heater. High density, built-in safe 1900mAh lithium polymer battery. The circuit and battery are protected by a steel casing, high load-bearing capacity.2Temperature Adjustment: High temperature mode 2-3.5 hours (53-60), medium temperature mode 3.5-5.5 hours (48-52)-low temperature mode 5.5-9 hours (40-50) (depending on environmental conditions) Depends).3Simple to Use: Wireless remote control, maximize comfort.4Can be Cut: Can be cut into suitable size, can adjust according to your shoe size and trim the sole to meet your needs, ranging from 34-37 Euro size, 38-41 Euro size and 42-46 Euro size.5Keep Feet Warm: Solve foot discomfort in cold weather. Keep you alive in certain winter activities (such as hunting, skiing, motorcycles, mountaineering or walking, etc.), simple and easy to use. Heated Insole with Remote Control Foot Warmer for Hunting1.Environmentally Friendly Materials: Safe and environmentally friendly materials, the latest high-efficiency carbon fiber heater. High density, built-in safe 1900mAh lithium polymer battery. The circuit and battery are protected by a steel casing, high load-bearing capacity.2.Temperature Adjustment: High temperature mode 2-3.5 hours (53-60), medium temperature mode 3.5-5.5 hours (48-52)-low temperature mode 5.5-9 hours (40-50) (depending on environmental conditions) Depends).3.Simple to Use: Wireless remote control, maximize comfort.4.Can be Cut: Can be cut into suitable size, can adjust according to your shoe size and trim the sole to meet your needs, ranging from 35-38 Euro size, 38-42 Euro size and 42-46 Euro size.5.Keep Feet Warm: Solve foot discomfort in cold weather. Keep you alive in certain winter activities (such as hunting, skiing, motorcycles, mountaineering or walking, etc.), simple and easy to use. Heated Insole with Remote Control Foot Warmer for HuntingSpecification:USB chargingVoltage: 3.0V-4.2VBattery capacity: 1900mAhInput: AC/100-240V, 40-60HZOutput: 4.2V-5VService life: more than 500 cyclesNumber of codes: S code: 35-38 Euro codeM code: 38-42 Euro codeL code: 42-46 Euro codePacking List:1 Pair of Insoles1*Remote Control1*Charging Cable1*Instruction