Rear USB connection for Head unit?

Jvc kw-r400 is the head unit.

I really like this head unit, but I don't know if it has a rear USB. Basically, I want to run a usb cable for iPhone to the rear of a head unit through my dashboard. I have it all worked out, but I need to know of this particular model has a rear USB connection and I can't find any customer reviews anywhere about it.

Also, if this doesn't have a rear USB, can anyone point me in the direction of a Double DIN head unit that DOES have one.

This Unit does not have a USB port in the rear, it has a AUX Input in the rear, Not the same.

The JVC KW-R500 offers this and is just a bit better all around than the JVC KW-R400
http://www.crutchfield.com/p_105KWR500/JVC-KW-R500.html

Here are others:
http://www.crutchfield.com/p_500W235BT/Alpine-CDE-W235BT.html#details-tab
http://www.crutchfield.com/p_105KWR800B/JVC-KW-R800BT.html
http://www.crutchfield.com/p_113DPX308U/Kenwood-DPX308U.html
http://www.crutchfield.com/p_158XAV64BT/Sony-XAV-64BT.html
http://www.crutchfield.com/p_130SPDA100/Pioneer-SPH-DA100-AppRadio-2.html
http://www.crutchfield.com/p_158XAV63/Sony-XAV-63.html
http://www.crutchfield.com/p_020CX201/Clarion-CX201.html

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