The BB-Leo is discontinued by its manufacturer (Modern Device) please use the BB-ProMini which is a drop in replacement for use in cpNodes for use in new systems. 

The BB-Leo is a small form factor Arduino Leonardo ("Leo"). This part number includes a BB-Leo and a header kit to interface with a cpNode.  This part WAS available directly from Modern Device, but we offered it for the convenience of those who wanted to combine shipping (especially our international customers for whom shipping approximates the cost of the part) and those who wanted "one throat to choke."

From time to time we have used BB-Leos as a result of returns from system reconfigurations or downsizing, dismantlement of layouts etc.