Features High Accuracy Measurement: Features a core resolution of 0.025% for precise voltage readings, ensuring reliable performance in various applications Easy Direct Power Use: No need for a separate power source, simply connect to the power supply being tested for instant functionality Low Startup Voltage: Operates effectively from a minimum of 2.7V, making it suitable for a wide range of devices and projects Durable Construction: Made from high-quality materials designed for long service life, ensuring consistent and dependable performance over time Reverse Connection Protection: Safeguards against damage by preventing burnouts when connected incorrectly, enhancing user safety and device longevity Features: 1、Made of material, and long service life. 2、This accuracy voltmeter has a "core" of 0.025% resolution to make sure sufficient margin, it has high accuracy 3、No need to supply power separately, use the power supply under test directly 4、Low startup voltage, green shows a minimum of 2.7V. 5、It has reverse connection protecting function and will not burn when connected. Specification: Features: 1. Made of material, and long service life. 2. This accuracy voltmeter has a "core" of 0.025% resolution to make sure sufficient margin, it has high accuracy 3. No need to supply power separately, use the power supply under test directly 4. 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% 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: between 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 thickn) (Without Mounting Ears); With Mounting Ears Length: Mounting Hole Spacing: 28mm, Aperture: 2.8mm Working Temperature: -10℃- 65℃ Package List: 5 * Digital Display Voltage Gauges Package List