There are both current and voltage display performance at the output port;
输出端设有电流电压双状态显示功能；
With 12 LED digital display, can show the tube voltage, current and count value.
具有12位LED数码管显示，可分别显示电压、电流、计数值。
The basic function is to convert a DC voltage into a digital display which can be read easily.
基本功能是将直流电压转换成容易读出的数字显示。
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