This acoustic glass break sensor filters out false signals through a unique signal analysis, thereby protecting against false alarms while ensuring the highest detection reliability. The wireless glass break detector analyzes the sound spectrum of shattering glass before and after it breaks. Utilizing FlexGuard technology, it examines the tone frequency, tone duration, and vibration amplitude. This makes it insensitive to ambient noise, making it particularly suitable for buildings with large glass surfaces. It detects the shattering of various common types of glass, including construction glass, single-pane, and laminated safety glass up to a thickness of 14 mm.