The Sunbeam GoHeat Cordless Heating Pad delivers portable, soothing heat therapy for pain relief anywhere and anytime you need it. The 9.5 x 12-inch cordless heating pad provides targeted, high-level heat therapy to the back, arms, legs, and shoulders—whether you're at home or on the go. Just slip the battery unit/heating pad controller into the pad's side pocket, adjust the strap to fit, and enjoy hands-free pain relief. This portable heating pad uses a convenient, rechargeable lithium-ion battery that runs for up to 4 hours on a single charge on Low setting. The pad heats up fast so you can feel the heat in 30 seconds and offers 3 heat settings for customized treatment. The entire flexible, Micromink hot pad and adjustable strap are fully machine washable for easy care—just remove the battery.