A friction clutch includes a clutch housing having a friction plate, a clutch boss having a clutch plate, a pressure plate, a sub clutch, and a power-assist mechanism. The local device sends a first ranging packet, which the remote device sends holds for a first hold time before sending a second ranging packet in return. Powered by one or more DC power sources, this invention combines into a single standalone multi-function unit the capability to deliver AC electrical power and also constant source or sink currents for LED lighting for general illumination or signaling, and optionally, also for charging or discharging one or more batteries.