The TENS 502 features 2 channels and 4 connections, easy to use adjustment controls, a timer and 3 different mode functions. The timer can be adjusted from continuous, 30 minutes to 60 minutes. The 3 pre-set mode as: Burst, Constant, Modulation. Includes: TENS device, 9V battery, 4 electrodes, 2 lead wires as well as instructions.
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