Naipo via Amazon offers the Naipo FDA-Approved Portable TENS Muscle Stimulator / Electronic Pulse Massager for $18.99. Coupon code "ZNM7U236" cuts that to $14.99. Plus, Prime members receive free shipping. That's the lowest price we could find by $12. Deal ends May 19. This pocket-sized TENS unit features:
  • 4 electrotherapy pads
  • 5 massage modes
  • 16 intensity levels
  • 3 timer options