Item Type: Mini Digital Voltmeter <br>Material: PCB <br>Purpose: DIY Production <br>Measuring Range: 0.00V-30.0V <br>Power Supply Range: DC 4.70-30.0V <br>Maximum Input: DC 30.0V <br>Allowable Error: ±1%, when greater than or equal to 10V, the error is ±0.3V, when less than 10V, the error is ±0.10 <br>Input Impedance: > 100K ohm <br>Working Current: Green <18mA <br>Refresh Speed: About 300mS Once <br>Display Mode: 3 Digit 0.36in LED Digital Tube <br>Lead Length: Approx. 15cm / 5.91in <br>Installation Hole: Hole Pitch: Approx. 28mm / 1.10in, Hole Diameter: Approx. 2.8mm / 0.11in <br>Working Temperature: -10℃~65℃<br>1、High Accuracy: This is a high accuracy DC digital display voltmeter head with a refresh rate of about 300mS once. <br>2、Basic Specifications: The measuring range of the DC digital display voltmeter is 0V?30V, and the low start working voltage is 4.7V. <br>3、Reverse Connection Protection: This is a DC digital display voltmeter with reverse connection protection, which will not burn when connected reversely. <br>4、LED Digital Tube: This is a DC digital display voltmeter head with 3 Digit 0.36in LED digital tubes. <br>5、Light Weight: This is a small and light digital display voltmeter head, which is very easy and convenient to carry.Input voltage higher than 30V may be permanently damaged.2 x Module