This 7-pin to 7-pin power cable is used to provide a daisy-chained link between two Nucleus-M follow focus motors enabling both communication and power distribution between motors. Note that a P-tap to 7-pin or 3-pin to 7-pin cable is needed to power one of the motors first before this cable transfers power and information to another motor. It is available in 18cm, 30cm, or 55cm lengths.