手动控制：
转动拨盘旋钮调节电阻器件的输入电压。只要将阻性负载插入插座，打开开关和调节旋钮。表盘上的数字越大，越热您的负载会。

This control is small in size and can be used to regulate the input voltage of resistive devices by turning the dial knob.