Specification: Origin: Mainland China Measuring range: DC5.00-30.0V Power supply range: 4-30V Maximum input: DC30.0V Allowable error: ±1%; greater than or equal to 10V, error ±0.3V; less than 10V error ±0.10 Input impedance: >100KΩ Refresh speed: about 300mS once Display mode: three-digit 0.56-inch LED digital tube Opening size: approx. 46 x 27mm/1.81 x 1.07 inches Operating temperature: -20 ℃ to +65 ℃ Product size: 48.00x29.00x22.00mm/1.89x1.14x0.87inch Note: If the input voltage is higher than 30V, the voltmeter may be permanently damaged. Low starting voltage, minimum 4.5v for red, minimum 4.7v for green, minimum 5.0v for blue. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1*Digital Voltmeter 1.Robust Waterproofing: Crafted with premium materials, this digital voltmeter stands up to the toughest conditions, ensuring durability and longevity even in high-moisture environments. 2.Crystal-Clear Display: Featuring advanced digital display technology, the voltage meter presents compatible with sharp, easy-to-read numbers, allowing for quick and accurate readings at a glance. 3.Compact & Handy: Designed with space-saving in mind, our mini voltage tester is not only small in size but also incredibly easy to install, making it the perfect addition to any toolkit or control panel. 4.Precision Measurement: Offering high measurement accuracy, this voltage panel meter delivers stable and reliable readings, ensuring you can trust its performance for critical electrical monitoring. 5.Versatile Application: This volt instrument tool is a true all-rounder, suitable for a variety of settings including homes, vehicles, boats, and industrial equipment, making it an essential tool for any electrical diagnostic needs.