This product has been discontinued. For information on a similar product or replacement please call us at (800) 338-2372.The Low Back Pain Relief System is intended for temporary relief of pain associated with sore and aching muscles in the lower back due to strain from exercise or normal household and work activities. Comes with instruction booklet, battery, belt, electrodes and cables. Freq: 1-180 Hz; pulse width: 100-300; intensity: 100 amp; wave: alternating. Treatment modes: shoulder, waist, elbow, foot, pound, push, press, knead, auto. Heating: 96-108° F timer: 10 / 20 / 30 minutes; unit will shut off if skin temperature reads 114° F Adaptor: DC 9V/1.2A; battery: 1.5 V x 3 (AAA) (load 500).