Adding your favorite MP3 player to your system couldn't be easier with the Universal Hideaway Bluetooth Receiver XL-BTR1. Designed to hide behind a panel, the XL-BTR1 is a direct connection device to our XL series amplifiers using the 3.5mm AUX OUTPUT that can be connected to amplifiers with a 3.5mm input using a separate 3.5mm male to male cable. The XL-BTR1 is easy to install and integrate into your sound system, giving you a wireless source and the ability to control it without ever having to lift your MP3 player for the safety of your vehicle. It is also waterproof for use on motorcycles, boats, or off-road vehicles without worry in extreme conditions.