DROK Two wires AC 80-300V 10-199.9HZ Digital Frequency Counter Cymometer Frequency Monitor Tester Panel Gauge 3 Digits Blue Backlight LCD Display
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<b>[Product Information]</b><br>
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<li>Accuracy adjustment: rotate potentiometer by screwdriver clockwise/counter clockwise to turn up/D</li>
<li>It adopts microcomputer Intelligent design to ensure stability and reliability</li>
<li>Installation Hole creates convenient and easy mounting</li>
<li>LCD material is used in display screen; black word in Blue background is Clear to read</li>
<li>It is two-wires access and doesn't require extra power supply</li>
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