The AQ-BC-5BT BlueCube is a high quality, robust and durable waterproof marine grade stereo designed to be installed hidden away out-of-sight. It plays music wirelessly via a Bluetooth enabled smartphone or MP3 device (wired connection can also be made with stereo RCA inputs). It features an onboard 288W amplifier capable of powering up to 8 x 4-Ohm speakers. It controls music directly from the Bluetooth enabled device or with the radio remote control 29.548.72 (sold separately).BLUECUBE technical specification:- Device Control: Bluetooth device or remote control.- Inputs: Bluetooth, RCA stereo. - Outputs: 4 amplified channels, 1 pre-out RCA stereo (4V).- Power (max): 4x 45W @ 4 ohm, 4x 72W @ 2 ohm.- Amplifier type: Class A/B (2 ohm stable).- Output Voltage: 9.6V - 14.4V DC.- Current Draw: 7A max (0.006A in Standby mode).- Waterproof: IP65. - UV Protection and Salt/Fog Protection: 500hrs stable. - Certifications: CE, RoHS, WEE, FCC.- Optional accessory: 29.548.78 Wired remote control.Technical specification of the wired remote control 29.548.72 (optional):LCD: YES. Power supply: 12V DC, 50mA. Power draw in standby mode: 0.3mA. Waterproof: IP65 & CFR46. UV Protection: ASTM D4329 - 500hrs stable. Salt/Fog Protection: ASTM B117, 500hrs stable. Bluecube remote control