This device has both TENS and EMS functions. The EMS functionality is great for Athletes because it improves muscle performance, strength and helps muscles recover and heal quicker. TENS helps to relieve muscle pain and soreness. Perfect as an Occupational and Physical Therapy aide. This electrical stimulator physical therapy has two channels with 4 electrode pads. Each channels intensity can be controlled separately. It has 12 programs. With a 60 minute adjustable timers the unit allows you customize the length of your treatment session for the best results. The automatic shutoff function will prolong your battery life. The unit is small and very versatile. PACKAGE INCLUDES: * Tens/EMS Device * 4 Small Latex-Free Electrode Pads *6 Large Palm Latex-Free Electrode Pads * 4 X-Large Latex-Free Electrode Pads * 4 Lead Wires * 2 Piece Pad Holder * Protective Hard Travel Case * Acupuncture Chart * Instructions Manual * Registration Instructions Please note that the tens belt for lower back pain has both Tens and EMS settings. Tens Modes are 1,3,4,5,8,9,11,12. EMS modes are 1,2,3,5,7,10,12. When you are using modes 1,3,5 and 12 you are utilizing both EMS and TENS functionality together. TENS BELT CLIP AND PROTECTIVE HARD TRAVEL CASE INCLUDED - What is TENS/EMS Therapy: TENS (Transcutaneous Electrical Nerve Stimulation) uses mild electrical currents to relieve pain, while EMS improves muscle performance, strength, and recovery. TENS massagers help reduce pain and muscle spasms caused by arthritis, period pain, nerve pain, back pain, and neck pain - Portable and Easy to Use: The Verve rechargeable TENS and EMS device provides non-invasive pain relief and improves your well-being; its large touchscreen display offers easy navigation through 12 programs and 20 intensity levels - Live Pain-Free: The Verve electric muscle stimulator offers non-invasive pain relief to help you relax and unwind; effective at reducing back, neck, and shoulder pain, labor pain, and pain caused by sciatica, arthritis, and sports injuries - Professional and Safe Electrotherapy: Developed with expert orthopaedics and chiropractors, our Verve device features two channels and 12 programs; each channels intensity can be controlled separately. The 60-minute adjustable timer lets you customize your treatment session for the best results - What You Get: 1 TENS/EMS device, 4 small latex-free electrode pads, 6 large latex-free electrode pads, 4 X-large latex-free electrode pads, 4 lead wires, 1 pad holder, instructional manual, warranty registration instructions