FEATURES : 24 preprogramed massage modes. Tapping, Acupuncture, Deep Tissue, Foot, Cupping, Combo. Adjustable 20 to 60 minutes timer by using " T " button. Rechargeable internal lithium battery. Up to 20 hours continues use. A-B Output will allow you to use it as 2 separate users. PAIN RELIEF: Techcare Massager contracts and releases the muscles. Chiropractors has been using these products. COMPLETE MASSAGER SET: TechCare Massager complete set comes with 4 Mode in 1 Dual A-B Massager Unit, 1 Controller,2 Large Electrodes (1 Pair) 6 Medium Electrodes ( 3 PAIRS ),2 Small Electrodes Pads (1 Pair), 2 Electrodes Cables, User's Manual, USB and , 1 Electrode Pad and Wire Holder, 1 Treatment Points Chart they all come with LIFE TIME LIMITED WARRANTY UPDATED MODEL TechCare Massager PRO is a dual-channel battery-powered multi-function device, offering both Transcutaneous Electrical Nerve Stimulator (TENS) and Powered Muscle Simulator (PMS) qualities in one device. Pro offers a large LCD Display, 24 Modes, and 2 outputs. This unit features an adjustable timer, battery life indicator, and a built-in lithium battery.