◎ R.S.T三相電源檢知
◎ 工作電壓範圍：AC100V~660V
◎ 工作頻率範圍：45Hz~70Hz
◎ 超大型液晶顯示器，易於讀取及操作
◎ 線路結構：電子式

* Large LCD display with back light, easy to read under the strong light or the dark environment.
* Electronic (not mechanical) rotation test, high reliability.
* 3 phase rotation detector.
* Input : 100 - 660 V AC, 45 to 70 Hz.
* Custom one-chip of microprocessor circuit
* 3 heavy duty alligator clips are included.
* Power supply : DC 9V 006P battery.