High quality: Highly waterproof design, high resolution digital LED display, show battery status even in harsh conditionsWide application: Suitable for 12V-24V, for Car/Boat/ATV/UTV/RV/Caravan/Trailer Battery Voltage Monitoring etc. Easy to Install: Mini size, just put it in your car. With reverse polarity protection function, the line will not be burned. If you have any questions, please contact the seller directly Description: This circular meter with LED digital display is used to monitor the battery voltage. It has reverse polarity protection. The cables will not be burned, and without twist and lock system, it is very easy to install and use. Technical data: For 12V-24V: Used to monitor battery voltage. Waterproof: yes. Digital LED display: Yes.Hole : 26mm Eco-Friendly Material: Made of high quality plastic, designed to enhance its usability. Include Package: 2 * LED VoltmeterNote: The data is all manual measurement, please allow 1 - 3cm error, due to the light and display difference, there will be a certain color difference, depending on the physical object received Delivery Quantity: (according to the main image)