Tens Electronic Pulse Massager is a user friendly product, which delivers electric impulses to tired and sore muscles. These impulses are generated by the device and delivered through the electrode pads on the skin to the target muscles. The impulses mimic the action potential coming from the central nervous system to trigger contraction of the muscle. The portable and compact Tens Electronic Pulse Massager is good for pain relief, which is FDA 510 (k) cleared. Using Tens Electronic Pulse Massager properly will provide you with a healthy and comfortable life.