This white combination therapy (Tens+Ms) mini by MEDGEARS is an electro therapy machine. It comes with built in battery backup and power input of 220V/50HZ. It also includes 2 channel TENS with muscle stimulator accessories. TENS sends electrical pulses through the skin to start your body's own pain killers. The electrical pulses can release endorphins and other substances to stop pain signals in the brain. TENS can reduce pain. Electrical muscle stimulation involves sending electrical impulses to the muscles. This process may promote blood flow and strengthen the muscles. It may also affect pain signals, reducing discomfort. Electrical muscle stimulation is available to treat various muscle issues and pain. The foremost benefit of this product is the reduction of pain. Therapeutic exercises and techniques like joint mobilization and treatments like muscle stimulation, or electric stimulation help the muscles and joint functions reduce pain. Sometimes it also prevents the pain from returning.