Glass-Break Detector Pair

The detector listens for the sharp paired frequencies of stressed and breaking transparent panels, then checks pressure and vibration before alarming. Mount it to structure, not a rattling decoration, and vacuum dust from the grille. Warm electronics lend it a faint toasted smell after years in service. It is cheap enough for shopfronts and passenger berths, though serious compounds layer it with cameras. Dropped tools and certain music can trigger poorly tuned units. Soft cutting, open frames, and patiently removed seals may not. Boltward sells Glass-Break Detector Pair from the legal front shelves, records the serial, and keeps bypass parts under a different key. The hardware is meant to delay trouble and preserve evidence—not grant the owner magical authority over a corridor.