The Boss Marine MGR250B is a dashboard stereo designed specifically to better coexist with the functions of our smartphone, which is increasingly used in audio streaming and yet needs a system to unleash music at a good volume and at a suitable quality level - The MGR250B was created to be our smartphone's best friend, allowing it to benefit from Boss Marine amplification with 50W (peak) for 4 channels - The unit is very compact and with a particularly attractive design. The buttons are well sized and can be operated even when wearing gloves - It has a Pre Amp output to be able to equip a separate amplifier. The AUX and USB inputs are located on the rear, but can be returned to the console via the optional MUSB35 accessory - Dimensions: Recess mm.76 - Depth mm.101 - Frontal dimensions mm.156x140