TDF(Theft Deterrent Faceplate)
13 Segment 13 Digit LCD Display
Rotary Encoder and Direct Key (iPod & Alphabet) for easy operation
Music Search & Mixed Preset memory function
Digital Clock (12H)
Key Illumination (Red)
Manual Dimmer Control Function (on/off)
​​​Maximum Output Power : 50W x 4 (MOSFET Power IC)
Front AUX & USB Interface with slide protection cover
1 Preout (2.5V)
Supreme sound reconstruction, restores musical to compressed music
Drive EQ
Rear/Subwoofer Switchable
Subwoofer Level Adjustable
System Q
Bass Boost
Loudness
Built-in LPF 
​MP3, WMA, WAV, FLAC Files Playback with ID-3 Tag Display
iPod/iPhone Direct Connection with Optional cable
iPod Alphabet/Skip/2 Speed Search Function
Pandora App Ready (iPhone App)
TuneIn / TuneIn Pro / Aupeo! Support (iPhone App)
Compatible with KENWOOD Music Control for Android 
FM/AM 24 Station Presets (18FM, 6AM)
Backup Memory for Tuner Preset
AME (Automatic Memory Entry)
Up/Down Seek Tuning
FM Stereo/Mono Selector
​OEM Remote Interface

more information ​click here: 
​http://www.kenwood.com/usa/car/receiver/kmm-108u/spec.html