Features: 12 massage modes are designed for relaxing muscles, relieving pain. Intelligent connection detection function - when the electrodes is not in contact with the body, the output strength will automatically reset to 0. Skin-friendly electrodes slice - Conduct electricity even, do not stimulate the skin, not easy allergy. Left and right channels independently control the output. Suitable for use on different body parts or two people with different strength. The LED high-definition screen is clearly visible day and night. Built-in battery to prevent overheating of the board and prolong its service life. Electric pulse massage, promotes local blood circulation and relaxes local muscles. Specification: Item Type: Pulse Massage Device Material: ABS Mode: 12 modes Power Supply: 3 x AAA Battery Main Machine Size: Approx. 13.5*6.5*1.5cm / 5.3*2.6*0.6inch Electrodes Slice Size: Approx. 5*5cm / 2*2inch Electrodes Line Length: Approx. 118cm / 3.9ft Pacakge list: 1 x Main Machine 4 x Electrodes Slices 2 x Electrodes Line TENS: It is used for the symptomatic relief of chronic intractable pain and the temporary relief of pain associated with sore and aching muscles in the arm, shoulder, neck, back, waist, abdomen and leg due to strain from exercise or normal household and work activities. EMS: It is used for relaxation of muscle spasm, increase of blood flow circulation, prevention or retardation of disuse atrophy, muscle re-education, maintaining or increasing range of motion, and immediate post-surgical stimulation of calf muscles to prevent venous thrombosis.