The BodyMed® TENS/EMS/Massager Combo unit is a 3-in-1 electrotherapy device offering high-quality relief where it’s needed most. Battery-operated, this lightweight TENS/EMS/massage unit allows for convenient, targeted therapy on the go. It features 22 programs, including nine TENS programs, eight EMS programs, and five massage programs. Each program controls the generated electric impulses, their intensity, frequency, and pulse width. Additional features include two independent channels, two outputs, and bi-phase square-wave pulse. Included with the combo stimulator are four electrode pads, two electric wires, three AAA batteries, one belt clip, and one user manual. Weights approximately 2.5 lb. Automatic shutoff after 1 minute.