Power inlet adapter and signal transmission line system thereof

A signal transmission line system, comprising:

• a signal transmission line including a first plug, a second plug, and a line set connected between the first plug and the second plug;
• and
• a power inlet adapter comprising:
• a main body including:
• a socket end configured to electrically couple with the first plug of the signal transmission line;
• a plug end configured to electrically couple with a first device and receive a first power signal provided by the first device;
• and
• a circuit board configured to electrically connect the socket end and the plug end;
• and
• a power inlet end configured to electrically couple with a first socket to receive a second power signal, wherein the power inlet end is connected to the main body through a connecting cable and electrically coupled to the circuit board via conducting wires in the connecting cable,
• wherein the circuit board has a control module configured to receive the first power signal and the second power signal,
• wherein the control module is configured to provide an output power signal to the socket end by regulating the first power signal and the second power signal,
• wherein the first plug is detachably connected to the socket end of the power inlet adapter,
• wherein the first plug receives the output power signal from the socket end and provides the output power signal to the second plug via the line set.