The Bose UB-20 Speaker Bracket is a very valuable accessory. You've just bought a Bose Acoustimass speaker system or a Bose Lifestyle compact music system. Though the sound output is fantastic, proper speaker placement helps add even a greater sense of realism and beauty. Those little satellite speakers may be placed on stands but, for most stereo and surround applications, mounting them on the wall/ceiling helps make the system even more impressive.