Description: 1.Compatible with: For for car/motorcycle/boat/ATV/UTV//caravans/travel trailer etc.and other universal models. 2.Waterproof and durable.Mini size and easy to install,work great for checking voltage. 3.The meter has easy to read LED segments and connect to your 12 volt system. 4.Used to monitor the storage-battery voltage, with reverse connection protection function, line will not be burnt. 5.Timely grasp the state of battery voltage, voltage measurement purposes can also be used for other products. Specification: LED Display: Blue Diameter: 3.7cm Measure Voltage: 6 - 30V Interface Type: Anode And Cathode Material: plastic colour: black Package Contents: 1 x Voltmeter(Without Line) 2 x wiring terminal 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.