ITEM NAME:DC Digital Voltmeter Head 0.36 inch LED Digital Voltmeter DC 4.5-30V Motorc M4Q8 DC Digital Voltmeter Head 0.36 inch LED Digital Voltmeter DC 4.5-30V Motorc M4Q8 Low cost,high accuracy to meet most application requirements.High precision:Low start voltage,red minimum 4.5V,green minimum 5.0V,blue lowest 5.0V.with reverse polarity protection,reverse does not burn. Measuring range:4.5-30V Maximum input:DC30.0V.Note:The input voltage is above 30V possible permanent damage!Tolerance:+/- 1%;greater than or equal 10V error is +/- 0.3V;the error is less than +/- 0.10 10V Input impedance:Greater than 100K Europe Refresh rate:about 300mS time;Display:three 0.36 inch LED Digital tube Colour:Black Light color:red light material:plastic Lead Length:15cm Dimensions:23 x 15 x 10 mm,length X width X thickness(without mounting ears); Including installation ear length:33mm Mounting holes:Pitch:28mm,Aperture:2.8mm Net weight:5.1g Working temperature:-10 to 65 Degrees Celsius Package Contents: 1* DC Digital Voltmeter Head.Lead Length:15cm. Including installation ear length:33mm.