With the SoundTouch SA-5 amplifier, you can add nearly any passive speaker and experience a world of wireless music. Easily. The 100 W per channel amplifier connects to your home Wi-Fi network and is part of an entire family of Bose products for every room of your home that lets you explore, organize and easily play your favorite music. And the free app gives you total control of the listening experience no matter where you are in the house. The SA-5 amplifier also has Bluetooth connectivity and three AUX ports so you can connect non-streaming sources, such as a CD player.