Keep pets off furniture or use for safety. Using structural vibration technology the TATTLE TALE can detect vibration in an object or surface without any apparent motion. TATTLE TALE sounds a distinct 2 second alarm. Then resets itself waiting for the next interruption. Features include: Automatic Alarm Reset with a HI / LO Sensitivity Switch, Works in any position, hang it, set or place it anywhere, Long Life Continuous Operation with a single 9V battery.