Emergency Exit Door Alarm, Finish Brushed Chrome, Cylinder Type Rim, Arm Type Paddle, Alarm Type Audible/Annunciation, Inside Keyed Cylinder Type Rim, Siren Style Continuous, Door Handing Non-Handed, Body Length 8 1/2 in, Body Height 3 1/4 in, Body Width 18 in, Decibels 99 dB, Power Source 9V Battery, Standards and NYC, CFM, UL 198G, For Use With CER Rim Cylinder and Replacement BP9 Battery Pack, Includes Batteries