STI STI-13210FR Universal Stopper® Fire Alarm Covers Universal Stopper^® Fire Alarm Covers, Surface – Each

Unique and patented device helps stop false alarms, without restricting legitimate alarms
On model with optional horn, when cover is lifted it sounds a piercing 105 dB warning, drawing attention to the area or pranksters
Horn will sound until cover is snapped back onto the frame (or for the life of the battery)
High strength piano hinge
Clear, tamperproof, tough polycarbonate shield and frame fit over pull station or call point
UV-stabilized covers are for indoor or outdoor use
Ideal for schools, hospitals, nursing homes, public transport, stores, hotels or any public area with an exposed fire pull station
Sized to fit most pull stations