Adopting high-performance design， this 03100384M Mini Waterproof Anti-Dust Shockproof Embedment Voltmeter Blue has good linear， low temperature drift and high input impedance. It is waterproof， anti-dust and shockproof due to its high-quality material. It is easy to install and safe to operate. The stable mini voltmeter is widely used in all kinds of instrument. The 0.28 inch ensures you to read voltage clearly and easily. Installing the mini voltmeter on your devices， you are able to observe voltage momently. So what are you waiting for? It will never let you down.                                    Features            Waterproof， anti-dust and shockproof<br>With 3-digital <br>28LED tube<br>Convenient to install and easy to operate<br>Low power consumption and power saving<br>Help you read voltage easily and clearly<br>A good replacement of you<br>                                                            Specifications             Model     03100384    <br> Quantity     1    <br> Color     Black    <br> Material     Plastic    <br> Weight     10 g    <br> Display Color     Blue    <br> Display Mode     3-digital 0.28LED tube    <br> Update Rate     About 1s/time    <br> Power Supply     Don’t need the power supply， direct use of the test voltage as a power supply    <br> Lead Wire Length     8.5cm    <br> Minimum Input     3.50V    <br> Maximum Input     30.0V    <br> Measurement Range     DC 3.50 ~ 30.0V    <br> Operation Temperature    -10C ~ 65C    <br> Measurement Accuracy     + / - (1% + 1 Digit)     <br>                                                             Package Includes            1 x Mini Voltmeter<br>