Photo 1 of Etekcity 4-Channel Rechargeable TENS Unit – Muscle Stimulator for Drug-Free Pain Relief, After-Exercise Relaxation, Physical Therapy, 8 Electrode Pads, Back, Neck, Shoulder, Sciatica, Period Cramps

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Photo 1 of Etekcity 4-Channel Rechargeable TENS Unit – Muscle Stimulator for Drug-Free Pain Relief, After-Exercise Relaxation, Physical Therapy, 8 Electrode Pads, Back, Neck, Shoulder, Sciatica, Period CrampsPhoto 2 of Etekcity 4-Channel Rechargeable TENS Unit – Muscle Stimulator for Drug-Free Pain Relief, After-Exercise Relaxation, Physical Therapy, 8 Electrode Pads, Back, Neck, Shoulder, Sciatica, Period Cramps