The EVD-1, Electronic Vibration Detector, is listed by Underwriters Laboratories, Inc. for primary protection of Mercantile or Bank, safe or vault, ATM machines and supplementary protection of interior units such as file cabinets, display cases, walls and ceilings. The detector must be used with an appropriate UL listed control unit. Main Features Detects all common threats to safes and vaults Sophisticated signal processing provides unprecedented sensitivity without false alarms Low cost, stand alone system Reliable, sensitive piezo sensor technology Integral, multi-color status LED Built in test circuit Remote test and annunciator capabilities Supervised microprocessor Independent tamper output On board test point facilitates installation and service Built in accumulator