This cat repellent is a cat training device that helps cats keep off furniture and counters. Use as a dog repellent to keep dogs out of rooms or off sofas. The Tattle Tale is a pet product using structural vibration technology for pet training. This motion alarm uses a sensor that detects vibration in a surface or object without apparent motion. Tattle Tale sounds a two second tone to alert the owner and to startle the pet to get off fast. Works in any position. Takes 9V Battery.