The ActionHeat 5V Battery Heated Winter Hat is designed for people who take on the outdoors, head-on. Featuring a tight, stretchy fit to trap your head's natural heat, you will love the extra comfort of strategically placed heating panels on both ears.  Once the beanie is powered on, the heating elements quickly heat up your ears and head in under 10 seconds. The rechargeable 5V lithium-polymer batteries deliver 3 levels of heat, controlled by the temperature controller on the hat. The hat can reach a maximum temperature of 130F while lasting up to 4.5 hours.  HOW TO USE: Charge Up – Fully charge power banks with provided charger kit. Plug-In – Connect the power bank to USB plug located in the pocket on the back of the head Turn On – Press and hold touch-button control on the hat for 3 seconds. Press touch-button to adjust the temperature. Features: Machine Washable - Gentle Cycle Built-in heating panels strategically placed over both ears Touch-button control technology (3 settings) 4 LED power indicators display power banks battery life Battery Voltage: 5-Volt Colors Available: Black Sizes Available: Unisex - S/M, L/XL Material Contents: Breathable fleece lined stretchy soft-shell Water-resistant softshell sheds rain and snow An advanced heat-trapping insulation layer Ultra-fine carbon fiber heating panels Estimated Heating Times: High (Red): 130F – 1.5+ Hours Medium (White): 110F - 2.5+ Hours Low (Blue): 90F – 4.5+ Hours Includes: (1) ActionHeat 5V Heated Winter Hat w/ heated ears (1) ActionHeat 5V Power Bank (3000mAh) (1) USB Charging Kit ActionHeat 5V Battery Heated Winter Hat