The Omron Electrotherapy Max Power Relief offers reliable Transcutaneous Electrical Nerve Stimulation (TENS) Technology for 100 percent drug-free musculoskeletal pain relief for lower back discomfort or recurring knee and shoulder pain. Get relief in as little as 15 minutes. The Omron PM3032 is among the most powerful units to date, yet it's the size of a typical smartphone. That means that you can take it to work or use it at home or while traveling. A sturdy belt clip and a soft carrying pouch...