Back wrap with HyperHeat technology offers six times faster heat than a standard heating pad for quick relief Three heat levels with three different vibrant patterns lend perfect massage to reduce stress from your back Adjustable compression strap allows you to custom the fit for perfect heat absorption Made using durable neoprene material for great performance, fit, and usage Connect to the Hyperice app using Bluetooth technology to easily control your wrap from anywhere Rechargeable lithium-ion battery offers three hours of relief to keep you comfortable throughout the day