Door/Window Sensor, 319.5MHz.
The TX-E201 Door/Window Sensor from Interlogix is a compact, low profile contact that provides intrusion detection for application in homes and small businesses. This sensor comes with both white and brown covers and can easily be installed on doors, windows, cabinets or other items that can be opened and closed. The TX-E201 Door/Window Sensor also contains a replaceable lithium battery that lasts up to five years under normal usage.
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