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The Ajax GlassProtect is a wireless glass break detector that listens for the specific sound frequency of shattering glass to alert you of a break-in attempt. Its built-in electret microphone is tuned to distinguish genuine glass breakage from everyday sounds such as thunder, barking dogs, and street noise, effectively filtering out false alarms. Compact and discreet, it can be mounted near windows to provide an additional layer of perimeter protection for your property. White model - BD428W. Black model - BD428B
| Alarm Signal Delivery Time | 0.15 |
| App Control | Yes |
| App Name | AJAX |
| Battery life | 7 Years |
| Break detection distance | Up to 9 m |
| Detection Range | 1700 m |
| Device Polling Period | 12−300s |
| Jamming Detection | Yes |
| Plug & Play | Yes |
| Power Supply | 3 V |
| Sensitivity Adjustable | 3 levels |
| Operating Temp (Min) | -10 °C |
| Operating Temp (Max) | 40 °C |
| Warranty | 2 years |
| MPN | 38108.05.BL1 |
| Model number | BD428 |