AccuRelief Wireless Remote Control Dual TENS Unit. Pre-programmed with three phases of alternating therapy for quick, safe and effective relief. Powerful with 25 levels of adjustable intensityincrease or decrease stimulation with remote control. 30 minute treatment with auto shut-off. Lightweight, flexible design of each unit shapes and contours to almost any body part. Small and compact to wear discreetly under clothing 2 replacement pads included.