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.
5 x 12-inch flexible, cordless heating pad delivers soothing, high-level heat for effective pain relief anywhere and anytime you need it * Rechargeable Battery: Portable heating pad uses a rechargeable, lithium-ion battery that runs for up to 4 hours on a single charge on Low setting * Stays in Place: Removable, adjustable strap fits up to 55 inches around for hands-free, targeted heat therapy to the back, arms, legs, or shoulders * Hotter and Faster Heat*: Feel the heat in 30 seconds and customize treatment with 3 heat settings that deliver Sunbeam Heating Pad-level heat** *vs. The 9. * Portable Pain Relief: 9.