The ELK-319WS is a Supervised, Wireless Window Sensor designed to detect the opening of a window or vibrations made by an intruder attempting to break the window. A built-in reed switch monitors window movement and a piezo shock sensor monitors vibrations. This sensor is compatible with Elk?s 319MHz Receivers/Panels as well as many other panels that operate on the 319.5MHz frequency. ELK?s 319 Series Sensors are ideal for Interlogix systems in need of replacement sensors.General InformationName: ELK-319WS WINDOW & SHOCKCategory: Elk Products Inc., Intrusion & Smart Home, Shock & Sound Detection, Vibration & Shock DetectorsUPC Code: 762158190032Country of origin: Taiwan. Country of origin is subject to change.This sensor is compatible with Elk?s 319MHz Receivers/Panels as well as many other panels that operate on the 319.5MHz Frequency and adhere to the ITI/Interlogix protocol.