Novation Dicers are small little MIDI controllers (sold in a pair) that can be used to map differnt functions.
They are about $99 USD.
5 buttons (3 different “banks” giving you 15 mappable buttons total”
The default for Serato (Scratch Live) is:
Bank 1 – Hot cues
Bank 2 – Auto Loops
Bank 3 – Loop Rolls
This can also be used to map the SP6 sampler of Serato Itch (and a few other functions)
However, they are more commonly used by Serato people on Turntables (they were actually made for 1200s) or CDJs.
I hope this helps.
I should have pictures up soon on my facebook page with the Dicers incorporated into my Itch/Scratch Live setup.
http://www.facebook.com/vinnyblanc (they actually drop right in to the 45 adapter (bottom left circle) of each turntable.