Comparing the NURSAL 4 in 1 TENS Unit vs. AUVON Dual Channel TENS EMS Unit
NURSAL 4 in 1 Tens Unit Muscle Stimulator, Dual Channel EMS Massage Machine with 40 Intensities, 25 Modes Rechargeable Electronic Pulse Massager for Back Pain Relief Therapy with Electrode Pads & Case AUVON Dual Channel TENS EMS Unit 24 Modes Muscle Stimulator for Pain Relief, Rechargeable TENS Machine Massager with 12 Pads, ABS Pads Holder,