Compact weather-resistant amplifier delivers massive power with minimal size, extreme durability built to withstand the harsh environments you'll meet on the sea, lake, or wherever your water adventure takes you. Featuring an unregulated power supply and a weather-resistant design. Use the mute function / level control on the rear channels when you want a better sense of what's going on around you without losing all your tunes or adjust the output level of a subwoofer. Add additional amplifiers with minimal wiring thanks to the Aux output RCAs and you can even stream Bluetooth directly to this mighty amp just by adding an iSimple ISBT23 Weather Proof BT receiver to your set-up.