This wireless system uses electrostimulation to ease arthritis pain, boost muscle strength, and speed recovery from injury. It delivers two types of therapy: TENS, which stimulates nerves for drug-free pain relief, and EMS, which mimics muscle contractions to accelerate strengthening and rehab. Gentle electrical pulses are sent wirelessly to receivers affixed to target areas on the body. Unlike similar electrotherapy devices, there are no wires to attach, facilitating treatment of hard-to-reach spots like the back. A handheld digital controller selects the therapy type, intensity level, and up to 60 minutes of treatment. Receivers charge simultaneously with the dual USB cable. Not for use with pacemakers. (2 lbs.)