The Stay Off! Mat works by sensing the pressure put on it and sounding an alarm until the pressure is removed. The Stay Off! Mat has been proven effective and painless for your pet. The Stay Off! Mat can be used to train your pet(s) to stay away from designated areas and favorite furniture. Simply place a 9V battery (NOT INCLUDED) into the battery compartment and turn ON. Place the product on a designated piece of furniture or area. Train your pet by placing him onto the Stay Off! Mat. When the audible alarm sounds remove your pet from the Stay Off! Mat instructing him with a firm NO command. This step should be repeated until the pet recognizes the audible alarm is the same as the NO command. If any wrinkles are present simply lay the mat flat and straitened out until the wrinkles have been eliminated. Dimensions: 1'' H x 8. 5'' W x 48'' D.