TENS + EMS COMBINATION UNIT. Dual Channel TENS EMS Machine for Pain Relief, 24 Modes TENS Unit Muscle Stimulator with 12pcs 2"x2" TENS Electrode Pads. INDEPENDENT DUAL CHANNEL. You can choose different modes and intensities for channel A and channel B. For example, you could choose P1 mode in channel A with an intensity level of 3 for your shoulder.
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