Feature 1This voltmeter is used to monitor the storage-battery voltage and timely grasp the state of your battery voltage. 2It will flash alert when the voltage reaches too high, such as up to 15V or 30V. 3There is a LED display with 3 Colors of indications to show different voltage status which helps to test the vehicle's battery status and improve safety. 4It is waterproof and durable for a long service time. With twist and lock system, it is in mini size and easy to install. 5It is universally fits for most DC 12V vehicles, such as motorbikes, cars, boats, ATV, UTV, camper, caravans, travel trailer etc. Description: This LED display volt meter is great for checking voltage. It can be used to monitor the storage-battery voltage and timely grasp the state of your battery voltage, and the voltmeter will flash alert when the voltage is too high. There are 3 Colors of indications to show different voltage status which helps to test the vehicle's battery status obviously and improve safety perfectly. Specifications: Material: ABS Color: Black shell Input Voltage: DC 12V Voltage Measuring Range: 5 - 15V(blue digital display) LED Color: Red(11.3V-11.9V), Amber(12V-12.5V), Green(12.6V-15V) Size(L*D): 4.1*3.7cm/1.61''*1.46'' Package Weight:22g Package Included: 1*LED Display Voltmeter 2*Terminal Connectors Note:s: Easy to install, but professional installation is highly recommended.