Features 1.【MORE PRECISE】The "core" resolution of the mini voltmeter is 0.025% to ensure that there is enough margin, the decimal point will move automatically, with high precision and more accurate measurement. 2.【EASY TO USE】Does not require a separate power supply and can be directly used on the tested power supply,this 2-wire digital voltmeter is easy to install and connect. 3. 【MEASUREMENT RANGE】The starting voltage is low, and green indicates a minimum of 2.7V. Maximum input: DC 32V, if the input current exceeds 32V, it will be permanently damaged. 4. 【REVERSE POLARITY PROTECTION】The display panel of the digital voltmeter has the reverse connection protection function. When the connection is reversed, the wire will not be burned. 5. 【PACKAGING LIST】There are 4 mini voltage testers available. Made of high-quality materials and equipped with a collision resistant shell, the structure is sturdy, durable, and has a long service life. 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 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% 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: 3m Mounting Hole Spacing: 28mm, Aperture: 2.8mm Working Temperature: -10℃- 65℃ Package List: 5 * Digital Display Voltage Gauges Package List