TENKER Unit Muscle Stimulator 24 Mode Massager Machine Rechargeable Pain Relief

USB cable information AC:100-250V DC:5V/0.5A 1A 1.5A 2A USB to micro-usb cable. EMS is Electrical Muscle Stimulation, is used as a passive exercise technique to stimulate muscles, assist in muscle strengthening, prevent disuse muscle atrophy, increase local blood circulation, muscle relaxation and toning, and achieve the purpose of muscle recovery and conditioning.