Specs:
USB port plays music directly from any USB stick/drive
Supports FAT16/32 up to 500GB
FLAC, AAC, M4A, MP3, OGG, WAV music supported
Direct connection, best possible sound
Android car integration via USB
iPod or AUX port with 5V harging
Music streaming/handsfree via optional Bluetooth Dongle.
Subaru 08-09 supported
Text supported for SAT emulation

Specs:
Bluetooth connection for many smartphones
Compatible with Android® Phones, iPhones® and other smartphones
Factory harness connects to the stereo
Hands Free Calls
Wireless Audio Streaming
Control from car stereo or from the phone
Select Subaru 05-09 supported

Specs:
Android phone - play, charge and control
USB Socket A accepting any USB stick/drive
Supports FAT16/32
Direct stereo connection. CD sound
Full control from car stereo or steering wheel over USB mass storage device or Android Phone
Additional AUX-IN 3.5mm (cable included)
Android MicroUSB and 3.5mm cables are included!
Subaru 08-09 supported
Text supported for SAT emulation

Specs:
3.5MM male fits any MP3 player, Smartphone
Additional USB 5V Charging
Factory harness connects to the stereo
Best sound possible. Not FM transmitter !
Bluetooth capable
Handsfree and wireless playback via GROM Bluetooth (Bluetooth sold separately)
Samsung Galaxy S and S II play and charge (cable sold separately)
Select Subaru 05-09 supported