This Harmony XVU audible buzzer unit is supplied with 24V AC/DC.It has a diameter of 60mm.This indicating bank buzzer is an accessory designed as an audible and signalling unit for modular tower light for custom assembly.It has a continuous or intermittent signal and its sound acoustic level is adjustable.It complies with CSA, UL, RoHS, CE standards and it has IP54 protection.86 dB loud buzzer allows for clear alerting on critical machine statuses even from long distance.It complies with international standards and certifications (CSA, UL, RoHS, EAC, CE standards and IP65).