TENS UNIT AND EMS: Our 2-in-1 device includes both TENS and EMS functions for pain relief or muscle stimulation50 PROGRAMS: choose from 15 TENS or 35 Muscle stimulation settings6 CUSTOMIZABLE PROGRAMS: If one of the 50 programs on the device does not work for you, you can customize the setting and save it as a new channel to provide the targeted pain relief you needELECTRODE PLACEMENT: Designed for customized relief, the digital display shows electrode placement so you can easily select from the 50 available programs for the targeted therapy your body needs