The Sony MEX-BT4050U is a brilliant Hands-Free Bluetooth Head-Unit that has USB iPod/Phone Control and also a Built-In Mic!
I feel the built-in Mic is a great option since not everyone wants to run a Mic from the Head-Unit to your steering column or rear-vison mirror. You do have the option to fit one with the optional XA-MC10 (Sold Separately) if you prefer an external Mic.
Features
ZAPPIN, Quick-BrowZer, Advanced Sound Engine (7-Band EQ, Listening Position)
Front USB, iPod/iPhone Control Feature, Bluetooth
Front Aux-In
52W x 4
Pre-Out: Front/Rear + Sub
Built-In Mic
Specifications
Display Panel:
Display Device – LCD Display
Panel Type – Slot-In
Panel Finish Colour – Piano Black
Key Illumination – Blue/Red
Tuner:
Preset – FM18/MW6/LW6
CD Deck:
CD-Text Display/Scroll
Multi Session MP3/AAC
Frequency Responce (Hz, dB) 10-20k, +/-1dB
S/N Ratio (dB) 120
Amplifier:
S-MOSFET Output Power 52W x 4
Pre-Out: Front/Rear + Sub
Front Aux-In
Front USB
EQ7 (7-Band Equalizer)
iPod/iPhone Control Feature:
Repeat Track, Album, Artist, Playlist, Genre, Podcast
Shuffle Genre, Album, Artist, Playlist, Device, Podcast
Pause, Resume Play
CODEC (for iPod/iPhone) Follows iPod/iPhone Compatibility
List Browsing (Folders/Files)
Passenger Control
ZAPPIN
USB:
Repeat Off/Track/Album
Shuffle Off/Album/Device
Pause, Resume Play
CODEC (for USB) MP3, WMA, AAC
List Browsing (Folders/Files)
ZAPPIN, Jump Mode
The MEX-BT4050U has the ZAPPIN feature I love so much and you can read a bit about that on a previous review Here
Another thing that I love about this unit is its familiarity, if you have used any of the CDX-GT or MEX-BT range you will find this unit a breeze to use.
Overall its an easy to use Head-unit with lots of features, Sony reliability and at a pretty decent price!