- SMD / SMT package: SOT666 / SOT563 with 0.50 mm pitch. - Adapter board to SIL / SIP for breadboard prototyping. - PCB has a solder mask layer to minimise the formation of solder bridges during soldering. - For connectors with 0.1 inch pitch, not included. - Bottom copper has a small ground plane and pads for prototyping. The tracks that interconnect the pads are easy to cut as needed.