Boss Audio MGV550B Multimedia Player w Touchscreen The Boss Audio MGV550B is a mech-less multimedia player built for marine use. Mech-less players have no CDDVD mechanism, making them ideal for people who take their music with them digitally. This unit can play digital media files directly from a USB flash drive or smart phone. Additionally, music can be streamed wirelessly from Bluetooth compatible devices, allowing you to enjoy your favorite streaming music service while on the water. The Boss