Relieve pain and relax muscle with drug-free electro-therapy. Portable and easy-to-use. Adjustable power settings. (8) TENS settings for pain. (6) EMS settings for muscle. Comprehensive safety features. Package includes: 1 BioMed Revive device, (4) 2″x2″ square reusable electrodes, (2) 3″x5″ butterfly reusable electrodes, 2 lead wires, 3 AAA batteries, 1 soft pouch, and 1 instruction manual.