This is a door/window contact that can be installed on doors, windows, and any other objects that open and close. the sensor transmits signal to the control panel when a magnet mounted near the sensor is moved away. External input for wired accessory is available at the N/C interface. the tamper protection ensures that sabotages attempts to move the contact will result in an alarm activation. LED flashes once: door/window is opened and transmitter sends signal to the control panel; LED lights on: low battery, please replace the battery immediately.

Features:
Smart door and windows sensor for daily security
Wireless 433Mhz EV1527 Door Window Sensor
Powered by 23A 12V battery , if door is open and close once in day battery work for 6 months .
Long internal antenna for wireless range up to 100 meter in open area
This is sensor only , no siren in it , this is connected to only security alarm panel which have frequency of 433Mhz and Learning by Code of EV1527