When the temperatures are bitter cold, the ActionHeat(R) Women's 5V Heated 1/2 Zip Pullover will provide you with a cozy base layer to combat the chill. Thanks to the powerful Tri-Zone heating technology, this shirt can keep your core as warm as 150degF on a frigid day. Fit Half zip pullover Standard fit Technology Heating panels made with ultra-fine carbon fiber FAR infrared heating ActionWave heat reflective technology Design Powerful Tri-Zone heating system includes 3 built-in heating panels on the chest and upper back Touch-button control technology 4 LED Power indicators display power banks battery life Battery voltage: 5-Volt Power system: 2 amp Additional Details Machine washable on gentle cycle 90-Day warranty Heats up to 150degF Includes (1) ActionHeat(R) 5V heated insulated puffer jacket with a hood (1) ActionHeat(R) 5V Power Bank (6000mAh) (1) USB Charging Kit Estimated Heating Times High (Red): 150degF - 2+ hours Medium (White): 130degF - 3+ hours Low (Blue): 110degF - 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 Turn on: Press and hold touch-button control on the chest for 3 seconds. Press touch-button to adjust the temperature