ARD512-W2-868 is a wireless Glass Break sensor for burglar alarm systems, ideal for protecting windows and glass panels in indoor environments. It detects the breakage of tempered, laminated, double, frosted, and float glass through high and low frequency acoustic analysis, reducing false alarms. It offers 868 MHz two-way communication with a range of up to 1600 meters in open field, AES128 encryption, automatic frequency switching against interference and 2 alarm inputs. Dahua