Dr.Ho Pain Therapy System helps relieve pain, relaxes tense muscles and improves circulation. TENS technology is used by doctors, physiotherapists and patients for safe, effective relief of pain Recommended for both chronic and acute pain Portable, clinically proven pain relief - get relief anytime, anywhere Powerful yet comfortable massage 12 different therapeutic techniques to adjust to your needs Great to use on back, leg, shoulders, neck and arms for effective treatment Includes 8 small pads, 2 large pads, travel bag and instructional DVD and manual