The ActionHeat Sleeping Bag Pad utilizes innovative technology designed to warm the body as you sleep in your sleeping bag. ActionHeat revolutionary products feature built-in heating panels and are made with ActionFlex material that provides lightweight warmth, comfort, and versatility. ActionHeat items use FAR infrared heating and ActionWave heat reflective technology to deliver hours of heat and comfort. ActionHeat allows you to stay warming and enjoy outdoor winter activities longer than ever before. HOW TO USE: Charge Up - Fully charge power bank with provided charger kit. Plug-In - Connect the power bank to USB plug. Turn On - Press and hold touch-button control for 3 seconds. Press touch-button again to adjust the temperature. Estimated Heating Times: 100% (4 red/blue lights) - 2 Hours 75% (3 red/blue lights) - 3 Hours 50% (2 red/blue lights) - 5 Hours 25% (1 red/blue lights) - 8 Hours Includes: (1) ActionHeat Sleeping Bag Pad (1) ActionHeat 7V Power Bank (1) Charger