BetterBasics via Amazon offers the MeasuPro Reusable Tens Electrode Pad for $24.99. Coupon code "TENSUNIT" cuts that to $14.99. Plus, Prime members bag free shipping. That's the lowest price we could find by $12. It can be applied to your shoulder, waist, arms, back, and legs and features a timer, 15 intensity levels, and five modes. Deal ends July 7.