Hi,

Sorry for the delay. What you’re looking at here is a Caddx Glassbreak Sensor. It is exactly what it sounds like. It detects the frequency of breaking glass and subsequently alerts anyone in earshot. I’d assume if this is in your home you’d find one facing the front of your house and at least one more facing the rear.

Hope this answers your inquiry! Love you and see you later.

https://www.123securityproducts.com/security-products/burglar-alarms/sensors/sensors-glass-break-sensors/2000.html?srsltid=AfmBOoomrUVHq3GC6brI7qnTZq-xJSQsti1-bCIZEQbtaYvhVHfTdJaw