Massage Type: Electronic PulseBody Part: Arm, Leg, Foot, Knee, Lower BackApplication/Usage: Pain Relief, RelaxationFeatures: Auto Shutoff, Drug-freePower Source: BatteryHeight: 2.8"Width: 7.6"Weight (Approximate): 0.03 ozCountry of Origin: ChinaLimited Warranty: 1 YearSmart-phone sized unit for great portabilityEasy-to-read screen with large buttons allows for simple operationVersatile, personal TENS unit with 8 pre-set modes offer more pain relief choices or a relaxing massage (arm, lower back, leg, foot, joints; tap, knead, rub)