The DSP2601 is a 20W wall mount speaker built-in 70V/100V transformer. It worked with multiple functional model: can select to match with constant-voltage amplifier to realize long-distance transmission or can directly connect audio source to play and etc., satisfy needs of various application environment, which is an ideal choice for industrial and commercial applications in hotel, school, office and factory where background music and paging is needed. Enjoy your music outdoors with DSP2601 waterproof wallmount loudspeakers, which is beauty, durability, performance and user friendliness. It delivers high quality audio as well as clean and clear announcements for public address systems. Default black color, white color optional.