Features1LCD Display: The LCD screen displays a body schematic that indicates the correct position of the pad for each selected mode. 2REDUCE PAIN: Massager machine combines 8 pre programmed massage modes, provide precise control to reduce muscle pain and alleviate body soreness. 3REUSABLE PATCH: Electrode pads are reusable and provide reliable adhesive properties, thus it sticks easily to your skin, back, shoulders and other body muscles. 4PORTABLE DESIGN: Digital pulse massage machine is small, lightweight and has built in AAA batteries, so you can take it anywhere. 5USB: You can use the USB power cord to connect to your computer or any outlet, making it easy to relax your body whenever and wherever you want.SpecificationItem Type: Digital Pulse Massage MachineMaterial: ABSRated Power: 2WRated Voltage: 4.5VRecommended Duration: 15-30 minutesBattery Type: 3 x AAA batteries (built in)Power Plug: US PlugPackage List4 x Pair of Massage Pad 2 x Snap Cable 3 x Batteries 1 x Sticker Board 1 x Instruction Manual 1 x Host 1 x US Plug 1 x USB Data Cable