Driverless horns completely built in aluminium, round shape, grey painted, rugged, light, rain and UV rays resistant. Supplied with mounting bracket. This horn is ideal for outdoor operations like stadiums, sports hall, parking, motor-vehicle on board advertising and all applications where speech intelligibility is important. This horns has been designed to be used in conjunction with drivers adopting W-18N 3/8' plugs. Suggested driver: PROEL HD60T.