Photo 1 of AVCOO Dual Channel TENS Unit Muscle Stimulator, 3-in-1 EMS Muscle Stimulator with 24 Modes & 40 Levels, Rechargeable EMS Massager for Sciatica & Back Pain Relief with 12 TENS Machine Pads, EVA Case

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Photo 1 of AVCOO Dual Channel TENS Unit Muscle Stimulator, 3-in-1 EMS Muscle Stimulator with 24 Modes & 40 Levels, Rechargeable EMS Massager for Sciatica & Back Pain Relief with 12 TENS Machine Pads, EVA CasePhoto 2 of AVCOO Dual Channel TENS Unit Muscle Stimulator, 3-in-1 EMS Muscle Stimulator with 24 Modes & 40 Levels, Rechargeable EMS Massager for Sciatica & Back Pain Relief with 12 TENS Machine Pads, EVA Case