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Product Description: The voltmeter is shown in 0.56-inch digital tube£¬ and its dimensions are compatible with the 85L17 digital panel. The operating voltage range (ie range) is wide and can operate in DC0-100V range. Applicable to a variety of DC voltage measurement purposes. Technical Reference: Dimensions: 70x41x17mm Hole size: 63mm x 37mm Green Display Range: DC 0~100V Maximum input: DC100V Display: three 0.56" LED digital tube Display color: green Refresh speed: about 200ms / time Sensor line length: 19cm Power supply circuit: DC meter How it works: Electronic watt-hour meter Note: The voltmeter needs to be prepared separately for power supply! 5V£¬ 12V can be (in line with the 3-30V range of DC voltage can be). 0-100V only measure the voltage£¬ only access 0-100V£¬ not connected to the power supply£¬ the voltmeter will not show!