The T-903B is a weatherproof outdoor column speaker built-in 70v/100v transformer. The 70v/100v transformer technique reduces line losses on longer distance and allows easy parallel connection of multiple loudspeakers. The built-in 4” full range speaker drivers are designed of wide frequency response 130 to 16kHz, the power output at 5w-10w could meet paging and music applications varies from room size and ambient noise surroundings. The aluminum enclosure and steel grille is of white color. It is also designed of weatherproof and heavy damage proof finish. Easy and secure wall mount installation in outdoor area through the supplied pair of metal mounting brackets. It is ideal choice for industrial and commercial applications in the outdoor area of train station, shopping mall, parking area and factory where background music and paging is needed.