The Bose SA-3 stereo amplifier works with your Lifestyle system and Bose speakers to bring music to an additional room in your home, or even outdoors. Enjoy jazz on the patio while the kids watch a movie in the den. At the same time, from the same Lifestyle system. The amplifier is easy to install, and you can even connect multiple amplifiers seamlessly to one Lifestyle system for up to 14 additional areas of sound indoors or out. You can control your music easily in each additional area with a dedicated Lifestyle expansion remote control (sold separately).