USB
AUX in
3 sets of preouts
EQ
looks
remote control

You can just look at this section...
Expandability:
» front USB input and rear auxiliary input
» compatible with Kenwood's Bluetooth adapter
» compatible with Kenwood's iPod control adapter
» satellite radio-ready (XM or SIRIUS tuner, service subscription, and antenna required)
» HD Radio tuner ready
» CD changer controls
» three sets of 4-volt preamp outputs

Don't forget this is Kenwoods Excelon lineup, their higher end stuff... the other one is a Panasonic. pfft