Check the listing for details. DMP 1128 Wireless Glassbreak Detector. Condition: New. Listed at 22.00 USD. The DMP 1128 is a compact, fully supervised wireless glassbreak detector designed for reliable intrusion detection in residential and commercial settings. Utilizing dual microphones, it listens for both the low-frequency shock wave and the high-frequency glass shattering sound, significantly reducing false alarms. With omni-directional detection up to 20 feet from framed or armor-coated glass, it offers flexible mounting on walls or ceilings to maximize coverage. The unit runs on a single 3 V CR123A lithium battery, providing up to 3 years of typical use. Operating at 905‑924 MHz, it communicates alarms, tamper events, and low battery status to any compatible DMP 1100‑series wireless receiver. Durable flame-retardant ABS housing and an operating range of ‑10 °C to +55 °C ensures dependable.