Electrode Wireless Massager - Rechargeable TENS Unit Muscle Stimulator with App Control. Safe & Effective Pain Relief: An electrode massager that's rechargeable, reusable, lightweight & flexible Use Anywhere: This electrode massager can be used anywhere on the body, with wireless massage freedom. Benefits: Auto and chronic pain relief, muscle recovery, joint inflammation, or just simple relaxation Massage Power: That has eight modes, nine strength levels and a 5 to 40 minute adjustable timer