MR1308UABK Bluetooth® - Fully Marinized MP3-Compatible Digital Media Receiver w/USB & SD Memory Card Ports & Aux Input Features:Weather Proof 50 Watts x 4 Max Power, Balance/Fader/Bass/Treble and Preset built-in EQNo CD or DVD Player, Plays MP3, WMA, FM/AM, or Digital Media on Smart PhonesCompatible with Audio out from Smart Phones and MP3 PlayersUSB, SD, Aux, InputFront Pre Amp OutputsDetachable Front Panel, Wireless RemoteBluetooth Hands-Free, Make and receive calls, Bluetooth Audio Streaming. Play and control music and apps like Spotify/Pandora wirelesslyBluetoothAllows our Bluetooth-equipped source units to make wireless hands-free calls when paired with a Bluetooth-equipped Smartphone. Communicate via the built-in microphone on most of our units [or external microphone if provided] and listen thru your car’s speakers.