The meter has easy to read LED segments and connect to your 12 volt system. Used to monitor the storage-battery voltage, with reverse connection protection function, will not be burnt. grasp the state of battery voltage, voltage measurement purposes can also be used for other . It works for 3V-35V. Mini size and easy to install,work great for checking Voltage. Universal for: Motorbike Car / Boat / ATV / UTV / / Caravans / Travel Trailer etc. Twist-and-Lock system.Display: 3-, LED digital tube With Touch-ON OFF Switch,easy to use and save energy. Support battery voltage value and capacity percentage of battery display Touch-about 5s to turn on or turn off the power. The state of your battery between full and discharged Waterproof; retardant material Measure voltage: DC 3V - 35V Size: 36 * 22mm Interface Type: Anode and cathode Color: Black Material: ABS LED display color: Green Application: Universal for all , motorcycles and other universal models. Package Contents: 1 * Voltmeter with Touch-ON OFF Switch 2 * Wiring plug Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.