This Harmony XVB audible buzzer unit is supplied with 12V to 230V AC.This indicating bank buzzer is an accessory designed as an audible and signalling unit for custom assembly.It has a 70mm diameterIt has a continuous or intermittent signal and its sound acoustic level is adjustable.It is impact resistant, dust resistant, water resistant, corrosion resistant, and vibration resistant thanks to its IP65, making it ideal for operation in harsh environments.It complies with international standards and certifications (CCC, CSA C22-2 No.14, EN/IEC 60947-5-1, EAC, UL 508 standards and NEMA 4X).