This is a hardware hackers dream with a host of features built in as shown below.
2 Relay outputs
4 Open Collector outputs
2 Built in Switches
8 General Purpose Digital I/O
4 Analogue inputs
1 Analogue output
16 pin LCD Interface
LED indication on most ports
Screw terminal connection on most ports
Flexible Power Supply
Board can be powered from Raspberry Pi
Board and Rpi can be powered from 5V supply
Board and Rpi can be powered by 2 separate 5V supplies
LED indication of 5VPi, 5V and 3V3 supplies
Fused 5V and 3V3 available on screw terminals
Prototyping area with pads for 14-pin SMT IC
Ribbon Connector (26 way) to the Raspberry Pi GPIO
Second Connector (26 way) to daisy chain a second Custard Pi -7
Check out this Slideshow for detailed information on how to use it.
Keep an eye on this website for any further information