Need a stereo option that simply focuses on Bluetooth? Look no further than the clever INF-BC4! This small pre-amp Bluetooth® controller from Infinity gives you maximum music with minimal hassle. Once installed, pair your Bluetooth device/stash it in a safe place, and use this BT controller to control all basic audio functions. Note: you will need an external amplifier in order to complete this system setup as this controller is “pre-amp”.