Cordless Heating Pad: Not include power bank, Compared with other plug-in heating pad, this portable heating pad offer a rechargeable battery pack and integrated pocket, which you can use in bed, working, cooking, housework, or outdoors. Heat-Up In Seconds: 3 levels of heating, can suit most needs, even heat distribution, 5s heats up quickly, that runs for up to about 6 hours on Low setting (113/45), 5 hours on Medium (131/55), 4 hours on High (149/65). Heating Pad for Back Pain Relief: Heated back brace features the latest heating technology, that can quickly heat up to improve blood circulation and lower back pain relief, lumbar, belly, stomach, cramps, sciatica pain relief, you will feel relief within minutes of your use. Adjustable Strap and Hands-Free: Large Heating Pad Size: (8 inch x 21 inch). This heating pads for cramps has adjustable velcro and elastic straps, can stretch from 25 to 63 inches to fit all waist circumferences. Intelligent Security Settings: Long press the button for 3 seconds to turn it ON/OFF. The default is the High temperature when it is turned on. It will automatically convert to Medium temperature after 5 minutes of no operation.