AccuRelief Electrotherapy Pain Relief Dual Channel TENS Unit. Six preset programs that correspond to a selected body part and six additional programs for tailored treatment. Powerful with 25 levels of adjustable intensity. 30 minute treatment with auto shut-off. Easy-to-read screen with large buttons allows for simple operation. The reusable premium electrodes are lightweight and flexible contouring to almost any body part. 4 replacement pads included.