HP F3K89AA#ABA Retail Expansion Dock for ElitePad

Specification Serial Ports:
4 Serial ports for legacy peripherals (DB9, powered, jumper selectable – 5 V/12 V)

USB ports:
6 USB ports:
One 24 V for printer
Two 12 V for complex character VFD and optional PIN pad
Four 5 V for scanner, keyboard, mouse, cash drawer, etc.

Video:
1 HDMI connector
1 VGA connector

Network:
1 RJ-45 (Ethernet)
Compatibility For ElitePad