Description of TPS-BT1: For installations where a full size radio/source until will not fit, Hifonics has designed the ridiculously small TPS-BT1 Bluetooth, pre-amp controller. That model comes from THOR Power Sports Bluetooth 1. It might be your favorite controller you have ever used. The amount of control and connectivity you will have at your fingertips is shocking. All the music, from your Bluetooth enabled device, directly into your system via this small controller. The TPS-BT1 is fully IPX67 protected against the elements so it is perfect for installation right in the dash of your Side-X-Side or off road application. For custom car builders, looking to keep an original clean look, This Bluetooth controller is a great option to changing out the original dash radio in a classic.