Electronic trumpet approvedR.I.Na. No. ELE/556806CS/1 and LLOYD'S REGISTER MCA Bureau Veritas eNMMA in accordance with international COLREG 72 IMO class III standards,mandatory for all merchant and tourist vessels from 20 to 75m, with voice amplifier and automatic fog signal. Sound level 131 dB, 690 Hz. Power supply 24V., consumption 4 Ah. Weight kg.6.1.