The HiDow Wireless TENS/EMS system is a battery operated wireless pulse generator that sends electrical impulses from a remote control to a receiver with electrodes attached. The electrodes are placed on the body to stimulate the nerves and feel gentle electronic sensation instead of pain. The Wireless remote controls the ON/OFF, 4 separate channels 20 Intensity settings, and 9 modes functions. The receiver with electrodes attached to them adhere to the skin and receives the pulse signal and sensations. Items Included: 1 remote 2 receivers 1 USB cable for charging 1 AC adapter 1 lower back electrode 1 set of Large pads 1 instruction manual