Sierra AC Inlet Port W Extension Cord The Sierra AC Inlet Port with extension cord included can be easily applied on any flat surfaces due to it broadening your power options with a contemporary design. The integrated extension cord is used for plug and play power. The AC Port can be used for battery chargers, shore power, engine block heaters, and common home electronics. The inlet port features a press fit watertight rubber cap and gasket that is used as a safeguard from water intrusion. The T