0.36 Inch DC 0-30V 3 Wire LED Voltmeter Digital Display Panel Volt Meter<br>Note: Since 2015\/9\/22， we do not have the Yellow one temporarily.<br> Feature:<br>  <br> Display Color: Red， Yellow， Blue<br> The black line connected to the public negative electrode， red line connected to positive pole of power supply， yellow line connected to positive pole of tested power supply<br> Material: Plastic Shell<br> Display Digit: 3<br> Measuring Range: DC 0-30V<br> Display Size: Approx 2.3cm x 1.2cm \/ 0.91&amp;quot; x 0.47&amp;quot;<br> Overall Dimension: Approx 3.4cm x 2.2cm x 2cm \/ 1.34&amp;quot; x 0.87&amp;quot; x 0.79&amp;quot; (L x W x H)<br> Cable Length: Approx 20cm \/ 7.87&amp;quot;<br>  <br> Package Included:<br>  <br> 1 x Digital LED Display Voltmeter