This is a white pair of micro metal gearmotor bracket extended, which enables convenient mounting of popular Sanyo-style miniature metal gearmotors.
This version of the micro serial servo controller is packaged as a partial kit in which the surface-mounted components are already assembled. Male header pins are included, but you can also connect your servos directly to the PCB if space or weight are a concern.
It is a patented design initially created for the POLOLU Orangutan Robot Controllers as an alternative to bulky mechanical switches.