MRBT200 Portable Marine Bluetooth Stereo Speaker - Black/Blue Boss Audio"s IPX4 Rated Portable Marine Bluetooth Stereo Speaker. Features: Water Resistant Construction Auto Pairing Audio Streaming Hands-Free Calling Built-in Microphone Track Control Color: Black/Blue Volume Control USB Cable (Included) USB Charging Warranty: 1 Year Specifications: 3.5mm Aux-In (Aux Cable Included) Up to 8 hours of Playback Li-ion Rechargeable Battery Range: Up to 33 ft (10 m)