| 摘要 |
A connection line includes a first plug connected to an electronic device, a second plug connected to a socket, a cable connected between the first plug and the second plug, a first light-emitting diode (LED), a switch, and a second LED. A cathode of the first LED is connected to a ground terminal of the cable. An anode of the second LED is connected to a power terminal of the cable. A cathode of the second LED is connected to an anode of the first LED through the switch. The first LED and the switch are located on the cable and near the first plug. The second LED is located on the cable and near the second plug. |
