This lightweight heat cushion is battery operated and made from durable foam material with a soft felt top. It has a fiber heating panel inside with a dial to adjust heat settings, 101° F - 136° F. The built-in 8800mAh battery lasts 3-5 hours. Just plug it into any USB wall or car charger; once fully charged, sit and enjoy instant-on toasty warmth.
The low voltage heating fiber is completely safe. The small and lightweight battery can be used to power other devices such as mobile phones, MP3 players, digital cameras, tablet PCs, etc. INSTRUCTIONS FOR USE
Use a mini-USB to USB cable and connect the mini-USB connector into the battery and connect the regular USB connector into any USB wall charger or PC. It may take several hours for a first time charge. The LED will blink RED during charge and solid RED once fully charged.
1. Turn dial past click to the desired heat setting.
note - Solid Green light when in use and blinking Green light when nearing battery discharge.