Universal for: Car / Motorcycle / Boat / ATV / UTV / Rolling / Trailers / Travel Trailer etc. Turn and close system. Display: 3 bits, LED digital tube It works for 12V-24V. Mini size and easy to install, to check the voltage. Status of your battery between fully and discharged. The meter has LED segments that are easy to read and connect to your 12 volt system. Used to monitor the storage voltage of the battery, with protection function with reverse connection, will not burn. It captures the voltage status of the battery, the voltage measurement purposes can also be used for other products. Waterproof Color: Black LED display: Green Measuring voltage: 6-30V Size: 1.4 inchx 1.4inch x 0.5 inch Type of Interface: anode and cathode Eco-friendly material: Plastic Application: Universal for all cars, motorcycles and other universal models. Package Contents: 1 x LED DC voltmeter 2 x blue Isolated terminals Only the above package content, other products are not included. Note: Light 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.