What are the differences between an iCAM4000 Series unit and an iCAM7000 Series unit?

Comparison Chart: iCAM4000 v iCAM7000/iCAM7100

FEATURES iCAM4000 series iCAM7000 series iCAM7100 series
Dimensions 8.6″x6.5″x3.2″ 7.01″ x 8.31″ x 2.52″ 7.01″ x 8.31″ x 2.52″
Weight 4.4 lbs 3.5lbs 3.5lbs
Power Input 12 VDC @2A 12~24 VDC, @2A 12~24 VDC, @2A
Voice Indicator English standard, others available English standard, others available English standard, others available
Iris Capture Range 10.2″ ~ 14.2″ 12″ ~ 14″ 12″ ~ 14″
User Input X X 6 definable function keys
Touch Screen LCD X X 4.3″ (iCAM7100 series)
Pin Pad External Only External Only Pop-up on screen (iCAM7100 series)
Flash X Flash for face capture Flash for face capture
Face Image Camera 0.3 MP 5 MP 5 MP
Communications Ethernet, RS422, RS232 Ethernet, RS422, RS232 Ethernet, RS422, RS232
Operating Temperature 32F ~ 104F 32F ~ 113F 32F ~ 113F
Storage Temperature 0 ~ 140F 0 ~ 203F 0 ~ 203F
Inputs / Outputs Proximity Card Reader (Wiegand In), Embedded Smart Card reader (optional), Wiegand In, Wiegand Out, Relay x 2 Proximity Card Reader (Wiegand In), Embedded Smart Card reader (optional), Wiegand In, Wiegand Out, Relay x 2, Programmable GPIO x 4 Proximity Card Reader (Wiegand In), Embedded Smart Card reader (optional), Wiegand In, Wiegand Out, Relay x 2, Programmable GPIO x 4