The end of the wire had become accidentally fused with the switch.
电线末端意外地与开关接合在一起。
Uses 4-wire connection with 2 wires to line voltage and 2 wires to SPST control switch.
采用4线，2线连接到线电压，2线连接到单刀单掷控制开关。
The ventilator is also equipped with wire control switch for controlling the power supply . The product features convenient installation and diversified colors as white, blue, gray and brass.
还有线控开关控制电源式，安装更方便，颜色多样化，有白色、 蓝色、 灰色、古铜色。
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