Features: 12 VDC Bell Can Be Used As A Fire Bell & Much More: Doorbell for hearing impaired, signaling bell & electric school bell Extremely Loud Bell Chime Alarm: Industrial grade ABS material, anti-oxidation & chemical resistant for use in demanding interior locations Multiple Installation Methods: This alarm bell can easily wire into devices with a 12 volt DC power output - see examples below Backed By Safeguard Supply Seller's Warranty: This 12v notification bell is backed by a 1 year warranty Loud, Crisp & Authoritative Ringing Bell Alarm that sounds an attention grabbing sound MADE WITH PRECISION: This industrial bell is not just limited to being a fire bell alarm though it works great in fire alarm systems. Many people hard of hearing or very noisy locations such as warehouses, manufacturing facilities or heavy industrial locations will replace their doorbell wired chime with this unit for use as a door bell alarm. EXTREMELY LOUD Industrial grade ABS material, anti-oxidation & chemical resistant for use in demanding interior locations. This is a loud ringing bell rated at over 85db. Versatile, loud & dependable with many uses ALL-PURPOSE DOOR BELL: This all purpose door bell can also used in conjunction with many other electronic devices with a 12 volt output, such as Safeguard Supply Era Series Receivers so you can hear the alert in extremely noisy and busy applications. It can also be used with devices that have form C relays (no/nc) as long as you power the fire bell/chime alarm with an external source or 12 vdc which makes a hard working office alarm system.