Dual Channel TENS Unit - TENS-3000 3 Mode Improved Technology : Most units use an analog system which is not very accurate. The TENS 3000 uses a microprocessor which gives exact dial performance. Microprocessor Benefits include an accurate timer and an accurate output of maximum full strength power of 80ma. Accurate as a digital unit yet easy to operate! Safety amplitude cap: Protects the Amplitude Knobs from accidental bumps or knob movements. Electronic Muscle Stimultion is an internationally accepted and proven way of treating muscle injuries. It works by sending electronic pulses to the muscle needing treatment.