The BD Series Audible Alarm is PATLITE’s latest compact sounder, redesigned to be approximately 40% slimmer (54.0mm deep vs. earlier models) while keeping a rugged, high-volume 98dB output. A front-access design with an easy screw-lock mechanism lets installers mount, remove and adjust the volume from the front of the panel, cutting installation time. Eight selectable sound groups (A–H), each with 4 channels — covering tones such as Beep, Bell, Stutter, Yelp, and melodic chimes like Fur Elise, Ave Maria and Camptown Races — are chosen via an onboard DIP switch, with Group A as the default. The alarm is IP65-rated for indoor or outdoor use, can be mounted upright, inverted or sideways, and is offered in DC12-24V (NPN or PNP transistor) or AC100-240V (NPN only) versions with Off-white or Dark Gray front covers.