Features:1. Made of high quality material, durable and long service life.2. This accuracy voltmeter has a "core" of 0.025% resolution to make sure sufficient margin, it has high accuracy3. No need to supply power separately, use the power supply under test directly4. Low startup voltage, green shows a minimum of 2.7V. 5. It has reverse connection protecting function and will not burn when connected.Specification:Condition: 100% Brand NewMeasuring Range: DC2.7-32VPower Supply Range: No Need to Supply Power Separately, Use the Power Supply Under Test DirectlyMaximum Input: DC 32V, input current higher than 32V will be permanently damagedAllowable Error: 0.1%Input Impedance > 100K OhmsOperating Current: < 18mARefresh Rate: About 300ms OnceDisplay Mode: Three 0.36'' LED Digital TubeLead Length: Approx. 15cm / 5.9inSize: Approx. 23 * 15 * 10mm / 0.9 * 0.6 * 0.4in(length x width x thickness) (Without Mounting Ears); With Mounting Ears Length: 33mmMounting Hole Spacing: 28mm, Aperture: 2.8mmWorking Temperature: -10- 65Package List:5 * Digital Display Voltage Gauges