Main Features:<br />Accuracy: ?Ħ1% <br />Refresh speed: 200MS per time <br />Display mode: 3 digits digital tube <br />Measuring range: 3.3 - 30V <br />Working current: Less than 20mA <br />Operating temperature: -10 ??c - 65 ??c <br />Red: Power supply +↔? measure voltage +↔? (3.3 - 30V DC) <br />Black: Power supply -↔? measure voltage-<br /><br /><br />    Specifications<br />General<br />	 Accessories Type: Voltmeter                                                  <br />                        Applicable Models: Universal                                                	<br />Dimension and Weight<br />	 Product weight: 0.020 kg                                                  <br />                        Package weight: 0.080 kg                                                  <br />                        Product size (L x W x H) : 2.7 x 1.4 x 0.7 cm / 1.06 x 0.55 x 0.28 inches                                                  <br />                        Package size (L x W x H): 3.5 x 1.4 x 0.8 cm / 1.38 x 0.55 x 0.31 inches                                                	<br />Package Contents<br />	 Package Contents : 1 x The Voltage Display Panel                                                	<br /><br /><br /><br />                                                <br />