In summary, the DD1 and DD2 series are docking connectors, designed to transmit power and high speed differential signals to mobile devices. The DD1 series is a thirty contact single row connector and the DD2 series is a forty contact dual row connector. The signal contacts are rated at 0.5A per pin and 1A per pin for the power contacts. The durable DD1 and DD2 series are capable of 10,000 mating and un-mating cycles.