Boss Audio - TUBE Portable Bluetooth Speaker System - TUBE. Features:. IPX5. Bluetooth Audio Streaming, HFP, A2DP, AVRCP. SD and USB Ports. FM Tuner. Track, Volume and Station Controls. Soft Touch Controls. Blue LED Illumination w/Music Sync. Audio Streaming. Audio streaming [A2DP] is an audio protocol of Bluetooth technology. This profile allows for audio to be streamed wirelessly from your compatible device, such as a Smartphone, to the source unit so you can enjoy your favorite music or strea