Voltage - 12v only. The 5v for the logic supplied from an on-board regulator, 300mA available for your own circuits.
Current - Up to 3A for each motor.
Control - I2C Interface, full direct control. Up to 8 modules on bus. Two modes of operation, direct control of motors or the ability to send a speed and a turn command.
Encoder - Processes quadrature encoder inputs from motor.
Size - 110mm x 52mm x 25mm