The 12 Volt DC Power Cord (Connects CPAP to Cigarette Lighter Socket) is a 6 foot long cable that connects a DC-compatible CPAP machine to any 12 Volt battery source. One end attaches to the machine's 12 volt jack and the other plugs into a socket similar to a car's cigarette lighter outlet.What is a 3 prong connector?
The third prong is the end of a bonding conductor, which is used to bond the electrical equipment to ground. Some people call it a ground wire, but that's like calling a twig a taproot. One part of your home's electrical system is a connection that establishes an electrical pathway to the earth. That connection is called the grounding conductor.What is a DC power plug?
The DC Power Plug is designed to supply direct current from a mains connection to a device, and is typically used to power small to medium appliances. Although there are various types of DC Connector, the most common type is sometimes referred to as a Barrel Connector.