Sunpentown UC-570 Electronic Pulse Massager Type: Electronic Pulse Massager Features: Dual-channel: for simultaneous use on two users or the ability to use 4 pads 5 auto programs 3 massage modes Liquid crystal display Intensity range: 0-80 volts Pulse rate: 0-120 Hz adjustable Pulse width: 0-200 us Timer: 15 minutes Electrodes: 1.5 x 1.5, 4/pkg FDA approved Specifications: System includes: Main unit, (4) Self-Stick Hypoallergenic electrode pads, (2) Lead Wires Power Source: (4) AAA batteries (not included) Dimensions: 2.25W x 7.75L x 7/8H (main unit only) Weight: 8 oz (loaded with battery)