These are fully solid-state devices manufactured by switch control [india] having long life and low power consumption. Solid-state buzzers generate no radio-frequency noise. The units are protected against polarity reversal, and are suitable for panel cut-out size 92 x 92 mm. The buzzers are available for operation on 12, 24, 110, 220/230 v dc/ac. These are also available in multi tone versions with sound output 95db to 100db.
