"15 W acoustic column in 100 V line, with 15, 7.5, 4 and 2 W sockets, certified EN 54-24 and Bureau Veritas ""Marine & Offshore"". It is a device with an enclosure of 102 x 300 x 109 mm and a swivel joint, all made of aluminum, for wall or ceiling anchoring. In addition to the usual uses of acoustic columns, such as places of worship, meeting rooms and lobbies of hotels or transport stations, their certificates allow the acoustic column to be used in public address and voice alarm systems that must comply with the EN 54 standard. as well as in boats and floating structures."