Fit & Design: Touch-button control technology (3 settings) Ultra-fine carbon fiber heating panels. The powerful Tri-Zone heating system includes 3 built-in heating panels, strategically placed on the knee/thigh and backside/seat for balanced warmth Technology: The powerful Tri-Zone heating system includes 3 built-in heating panels, strategically placed on the knee/thigh and backside/seat for balanced warmth 4 LED power indicators display power banks battery life Battery Voltage: 5-Volt Power System: 2 amp Additional Details: Machine Washable - Gentle Cycle One ActionHeat Base Layer Pants One ActionHeat 5V Power Bank (6000mAh) One USB Charging Kit