The USB IO Interface belongs to m3 (Missile Works Mini Module) Component family, and provides USB interface capability and data transfer between the RRC3 and a host computer. Use the USB IO with the mDACS Windows based application software to upload flight data, altimeter settings, and to perform flight simulations and detailed diagnositcs.
The USB IO can also provide the necessary logic power to your RRC3 altimeter for all data transfer operations, circumventing the need for an external battery or power supply to communicate with the altimeter.