The USA-740 offers built-in Bluetooth (microphone included), answer calls and get Bluetooth steaming music from your Bluetooth capable phone or Bluetooth compatible device. A solid 300-watt peak power, Hi 4-volt, 4-channel RCA Pre-outs and a Subwoofer RCA Pre-out for additional amplifiers. The USB input allows you to plug in a USB flash drive (thumb drive) for playback of MP3/WMA/FLAC/WAV song files. A front mini jack auxillary audio input provide versatility for options like satellite radio, I-Pod or any portable player you wish to use. Match the dominant color of your instrument cluster with user selectable multiple LCD color choices with LCD dimmer control. The AM/FM RDS tuner shows station, song, and artist on the LCD display.