Features Made of high quality material, durable and long service life. This accuracy voltmeter has a "core" of 0.025% resolution to make sure sufficient margin, it has high accuracy No need to supply power separately, use the power supply under test directly Low startup voltage, green shows a minimum of 2.7V. It has reverse connection protecting function and will not burn when connected. Specification: Condition: 100% Brand New Measuring Range: DC2.7-32V Power Supply Range: No Need to Supply Power Separately, Use the Power Supply Under Test Directly Maximum Input: DC 32V, input current higher than 32V will be permanently damaged Allowable Error: 0.1% Input Impedance > 100K Ohms Operating Current: < 18mA Refresh Rate: About 300ms Once Display Mode: Three 0.36'' LED Digital Tube Lead Length: Approx. 15cm / 5.9in Size: Approx. 23 * 15 * 10mm / 0.9 * 0.6 * 0.4in(length x width x thickness) (Without Mounting Ears); With Mounting Ears Length: 33mm Mounting Hole Spacing: 28mm, Aperture: 2.8mm Working Temperature: -10℃- 65℃   Package List: 5 * Digital Display Voltage Gauges Package List