High-precision 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. 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. Reverse Connection Protection: This voltmeter is designed with user in mind, including reverse connection protection, It prevents damage to the device if the wires are accidentally connected reversed, in which case will 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. Colour:As Shown Material:Plastic Package Contents: 6 x Digital voltmeter(2 x redand2 x greenand2 x blue) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.