HealthmateForever combined TENS & PMS units are nerve stimulators for pain relief and muscle stimulators for muscle conditioning that use self-adhesive electrode pads to targeted specific nerve and muscle areas. FDA cleared Class II OTC (Over the Counter) HealthmateForever TENS & PMS devices combine modern digital prorgramming technology, TENS & EMS technology, bioelectricity technology and human body simulation technology with ancient Chinese therapeutic methods.