EASY INSTALLATION: The device comes with only two wires, simplifying the connection, the red wire is positive and the black wire is negative, making setup quick and simple for any user. High- measurement: This voltmeter has automatic decimal point adjustment and fine-tuning potentiometer, Ensures accurate readings. Ideal for detailed monitoring of solar projects, automotive applications, and more. Reverse Connection Protection: This voltmeter is designed with user safety in mind, including reverse connection protection, It prevents damage to the device if the wires are accidentally connected reversed, in which case appear on the screen. Optimal visibility and durability: Features a large, bright LED display housed in a rugged plastic housing to protect against physical shocks. The clear, vivid display ensures that measurements are easy to read from any angle., Manufacturer: Akfldms