Sunbeam USB Heating Pad for Back, Shoulder, Arm, and Leg Pain Relief with Power Bank Pocket and Auto Shut Off, 12.5 x 7.

Pain Relief On the Go: Compact heating pad plugs in anywhere with its USB connector or converts to cordless using Your Own power bank
Plug in Anywhere: USB connector allows you to plug into Your Own power source such as a computer, USB wall adapter, car USB port, or power bank (power source not included)
Convert to Cordless to Move Freely: Transform to a cordless heating pad by connecting to Your Own power bank (not included) and storing in the integrated pocket
Compact to Take Anywhere: 12.5 x 7.5-inch pad neatly rolls to fit into small bags and purses
Hands-Free Heat Therapy: Adjustable strap (up to 55 inches) keeps pad in place on back, arms, legs, or shoulders. Washing Instructions: Do Not Dry Clean. Do Not Use Bleach. Do Not Use Wringer. Do Not Iron.
Convenient Features: Customize treatment with 3 heat settings and 2-hour auto-shutoff; luxurious Micromink pad is machine washable
Must Be Connected to Power Source: Pad does not charge and must be connected at all times to a power source (2A power source for optimal heat performance)