Characteristics: 9 massage modes are designed to relax muscles, relieve pain. Intelligent connection detection function - when the electrodes do not contact the body, the output force will automatically reach 0. Skin-friendly electrode patch - Even conducts electricity, does not stimulate the skin, not easy to allergies. The left and right channels control the output independently. Suitable for use on different parts of the body or two people with different strength. The high definition LED screen is clearly visible day and night. Real-life simulated technique, real-life massage biocurrent simulation. Built-in battery that prevents the board from overheating and extends its life. Electric impulse massage promotes local blood circulation and relaxes the local muscles. Specification: Item Type: Pulse Massage Device Material: ABS Main Machine Size: Approx. 12*6*1.6cm/4.7*2.4*0.6inch Electrode Patch Size: Approx. 5*5cm/2*2in Electrode Line Length: Approx. 120cm / 3.9ft Package List: 1 x Main Machine 4 x electrode patches 2 x electrode line 1 x Manual TENS: is used for the symptomatic relief of chronic incurable pain and temporary relief of pain associated with pain and aches in the muscles of the arms, shoulders, neck, back, waist, abdomen and legs caused by exercise or normal home and occupational work. EMS: Used to relax muscle spasms, increase blood flow, prevent or delay the decline of disuse, re-educate muscles, maintain or increase range of motion, and immediately stimulate the calf muscles to prevent venous thrombosis.