Zewa introduces the SpaBuddy Relax—Back Pain Therapy OTC TENS Unit with TENS Belt. This unit is the easiest to use OTC TENS in the market. Everything can be programmed using only 1 hand by pressing the MODE button and selecting one of the 8 TENS programs. The large LCD display and 5 button design make it easy to change a program, adjusting the timer or changing the intensity level. With 30 intensity levels, displayed with intensity bars, it can be adjusted in small increments so that everyone can find their most comfortable level. Safety is always our main concern which is why the Zewa TENS unit features a unique sliding button to lock the device from accidental changes. With an easy to wrap around TENS Belt it is now painless to strap it around your waist and treat your back pain. This device is so easy to use, that it has been FDA approved for sales without a prescription.