NON-INVASIVE, DRU-FREE PAIN RELIEF TENS UNIT: The dual channel TENS unit, which stimulates your body through intelligent microcomputer control! It is a safe, non-invasive, drug free method of pain relief used by physical therapists. Further protects you from harmful additives and consumption of prescription medication. 16 MODES AND 20 INTENSITIES:The 16 modes allow you to get the wonderful feeling of acupuncture, massage, tuina, pounding, cupping, palm kneading,foot Massage,Gua Sha and other functions with the simple touch of a button. You can choose 20 levels from low to high according to your actual situation, effectively help you relieve fatigue and reduce exercise Injury. DUAL CHANNELS WITH 8 ELECTRODES PADS: The dual-channel design allows you to vary the intensity at the same time for different parts, and the 8 different shaped pads easily stick to the skin of neck, shoulder, back, leg, etc. allows 4 pads to be applied to the two different targeted areas at the same time. RECHARGEABLE AND PORTABLE: up to 10 hours of continuous use. It can be connected to wall unit or computer USB port to charge.Built in timer from 10 to 60 minutes, and the size of a cell phone can be carried around to use at the gym after exercise or relax the body after work. KIND NOTE: Do not use massage sticks near the heart, inflammation and wounds, sprained bones, larynx and other parts; Avoid touching the pads when the unit is on; Prohibited for use by pregnant women, heart disease patients, children, hypertension patients,people with pacemaker or other life support equipment etc. please read the instructions carefully before use.