It's a 12V DC Naza M Lite Multi-Rotor Flight Controller. The Naza M Lite Flight Controller is primarily designed for multi-rotor aircraft and does not have a direct relationship with speed specifications. It is responsible for controlling the flight stability and navigation of the drone rather than the actual propulsion or movement. The "Speed At Rated Load: 8.4 in/min‚ 12 V DC" you mentioned seems to be referring to a specific motor or actuator that is connected to the Naza M Lite Flight Controller. This specification indicates that the motor or actuator can achieve a speed of 8.4 inches per minute when operating at a rated load of 12 volts DC