The MVH-S215BT lets you enjoy hands-free calling and audio streaming in the car, courtesy of built-in Bluetooth® with internal mic. Other entertainment options include a front USB input, Aux-In and AM/FM radio.Receive pristine sound from the MVH-S215BT’s built-in amplifiers with 4 x 50W of pure MOSFET power. For even more power, you can use the RCA pre-out to hook up an amplifier to provide additional power for speakers or subwoofers.Note: Front USB input is not compatible with iPod/iPhone devices. Alternatively, iPhones can connect to the MVH-S215BT.