Universal for: Car / Motorcycle / Boat / ATV / UTV / Rolling / Trailers / Travel Trailer etc. Turn and system. Display: 3 bits, LED digital tube It works for 12V-24V. Mini size and easy to install, it works great to check the voltage. Status of your battery between fully charged and discharged. The meter has LED segments are easy to read and to your 12 volt system. Used to monitor the 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 - material: Plastic Application: Universal for all , 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 the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.