Characteristics: 1. This voltmeter is used to monitor the battery voltage and timely capture the battery voltage status. 2. It will flash a warning when the voltage reaches too high. 3. An LED display with 3 colors of indications is available to show different voltage states, which helps, of course, to test the condition of the vehicle battery and improve safety perfectly. 4. It is waterproof and durable for long time use. 5. With its twist and lock system, it is small in size and easy to install. 6. Universally fits most DC 12V vehicles, such as motorcycles, cars, boats, ATV, UTV, motorhome, caravans, travel trailer itp. Technical data: Material: ABS Color: Black Coating Input Voltage: DC 12 V Voltage measurement range: 5 - 15 V (blue digital display) LED color: red (11.3 V-11.9 V), amber (12 V-12.5 V), green (12.6 V-15 V) Size (L. x D. ): 4.1x3.7 cm/1.61'' x 1.46'' Package weight: approx. 22g The package includes: 1 x Voltmeter with LED Display 2 x Terminal Connectors Easy to install, but professional installation is recommended.