Use this Bodi-Tek belt to tone, strengthen and define core and back muscles. A great complement to your usual workout, get that six pack even quicker with this fantastic ab belt. Total EMS ab and back strengthening. Works on upper, middle and lower abs and mid and lower back area. Advanced EMS muscle toning - when exercising, small electrical nerve signals stimulate the muscles to contract. Bodi-Tek toners mimic these signals to simulate exercise, delivering advanced muscle development. 12 magnets. PP3 battery supplied. 4 programmes - Target training, advanced, shiatsu massage and rehab. 8 pads included. One size fits all. Includes conductive gel. General information: Size H29, W29, D7.5cm. Batteries required 1 x 9V (included). Manufacturers 2 year guarantee.