Amazon has the Auvon Rechargeable TENS Unit Muscle Stimulator (BD15490) for $30 - $11 off with coupon 2BWYBERO = $19 with free shipping on $25+ or with Prime. List price: $33. Features 16 pre-programmed massage modes with adjustable intensity, up to 10 hours of runtime per charge, 8 reusable 2" x 2" electrode pads.
Has excellent Amazon Reviews.
Amazon has the SEAGO Sonic Rechargeable Electric Toothbrush w/ 8 Heads (Black) for $30 - $12 off with coupon 40C71RXL (Ends 9/22) = $18 with free shipping on $25+ or with Prime. Clinically proven superior 3D Cleaning Action oscillates (up to 40000 strokes/min). Has excellent Amazon Reviews.