Check the listing for details. TENS 7000 2nd Edition Digital TENS Unit with Accessories. Condition: New. Listed at 45.99 USD. An electrotherapy machine with everything needed for TENS therapy, a class leader in electric massagers for muscles. PRESCRIPTION STRENGTH PAIN RELIEF. A TENS unit muscle stimulator and electric massager that provides pain relief acts as a muscle massager or shoulder massager, provides carpal tunnel relief, and acts as a muscle relaxer, a perfect device for muscle recovery.An electrotherapy machine with everything needed for TENS therapy, a class leader in electric massagers for muscles. PRESCRIPTION STRENGTH PAIN RELIEF. A TENS unit muscle stimulator and electric massager that provides pain relief acts as a muscle massager or shoulder massager, provides carpal tunnel relief, and acts as a muscle relaxer, a perfect device for muscle recovery.