EACH KIT INCLUDES – 1 Tamtec Sport 2 Plus Unit, Total of 12 Self-Adhesive Electrode Pads, 2 Lead Wires (with Negative and Positive Indicators), 1 Rechargeable Battery, 1 Wall Charger, 1 USB Battery Charger, 1 Instruction Manual with Pad Placement Charts, 1 Carrying Case. DESIGNED WITH YOU IN MIND – Has 2 independent/isolated channels, which allows you to use 4 pads simultaneously. Other features include: large digital screen, soft push buttons, adjustable timer, adjustable intensity controls, rechargeable battery, user-friendly, free carrying case with compartments, ergonomic design. Dimensions of the unit - Length: 7.09" Width: 4.72" Height: 1.22-1.81". EASY-TO-USE, SAFE, AND EFFECTIVE – This device is perfect for those who wish to use an Electrotherapy machine in the comfort of their own home, saving them time and money. Non-invasive, Drug-Free pain relief at your fingertips! If you have a pacemaker or any metal plates/pins in your body, consult your physician before purchg. 8 PRE-SET PROGRAMS – A variety of programs allows you to use this Muscle Stimulator for different purposes (3 for Strength, 1 for Muscle Building, 1 for TENS/pain, 3 for Recovery). Unlike other Muscle Stimulator units that only have TENS and EMS functions, this machine also includes Russian Stim, Micro-Current, and Interferential (IFC). Each program has multiple intensity / progression levels, ensuring a comfortable feel for the user. GET PAIN RELIEF AND IMPROVE MUSCLE PERFORMANCE – An easy-to-use Electronic Muscle Stimulator (EMS) and TENS unit that provides fast and lasting muscle pain relief from injuries, strains, sprains, arthritis, carpel tunnel, tennis elbow, stiff neck, tension, sciatica, back pain, knee pain, hip and waist pain, and other ailments. In addition, this device helps increase muscle strength, performance, motion, function and improves overall circulation.