With the Infinity by Harman INF-BC4 Pre-Amp Bluetooth Controller from Prospec Electronics, anyone with a Bluetooth enabled device can stream his favorite music. This standalone audio solution solely focuses on the most popular mode of audio, Bluetooth. A small footprint makes it ideal for trailerboats. The all-weather INF-BC4 features a rotary encoder and large buttons for ease of use while moving. Pairing a device to the controller is simple. Once connected, the phone or other Bluetooth-enabled device can be stored in a glove box, console or pocket.