Set alarm point and set peak memoryWith digital display, visual observationParameter display is accurate and stable, low power consumptionEasy to install, stable performance, anti-vibration, anti-shockInstallation Precautions:1. This product is suitable for 12V power supply, and it is strictly forbidden to use a power supply exceeding 18V2. The power access of this product is red and black power cords, the red line is connected to +12V, and the black line is connected to -12V.3. Other connections are connected in accordance with plug-and-play connectors, and it is strictly forbidden to damage or replace other connectorsBackground light: Red LED + White BackgroundName:voltmeter gaugeMeasurement Range: 8~18VWorking Voltage: 12VApplicable models: Universalcolour: blackMaterial: ABSSize: 60.5x60.5x28.5mmPackage Contents:1 x Voltmeter1 x connection line1 x English manualOnly the above package content, other products are not included.Note: Light shooting 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.