Omron Pocket Pain Pro TENS Unit White PM400 - Best Buy
Easy@Home Battery Powered Tens Machine | Combo - Electronic Muscle Stimulator + Tens Unit + Pain Relief Machine at best price.
Amazon.com: TENS Unit Combination Muscle Stimulator with 2 Channels, 10 Modes for Pain Management and Rehabilitation for Muscle Relief of The Back, Neck, Arms, Legs, Abs : Health & Household