Stopper II helps prevent false alarm situations without restricting legitimate alarms. Tamper-proof, clear Lexan® shield and frame fit easily over manual-pull fire alarm stations. When shield is lifted to gain access to fire alarm, it sounds a piercing warning horn. Larger sizes and surface-mounted pull stations can be accommodated with a spacer that adds 2" of depth. When installed with gasket, it provides weatherproofing for outside pull stations. Power source is 9 V battery (included). Remote powered unit available.
Flush Mount Stopper II without horn: Back plate inside measures: 6 1/2"W x 7"H with cover maximum depth of 3 1/5"
Note: Spacer for surface mounting adds 2 inches to overall depth