Installation is a breeze with the two-wire interface design of this battery voltage meter. It requires no additional power supply, making it easy to set up and use. This user-friendly design ensures that even those with minimal technical knowledge can install and operate the marine battery tester without any hassle, making it a convenient addition to any battery monitoring system. Features -Color:Black -Material:Plastic -Size:6.00X3.50X1.50cm/2.36X1.38X0.59in Voltage: 12V Input Voltage/Output Voltage/Range: 8- Working current: <=15mA Refresh speed: 500ms/time Backlight color: colorful -High resolution display: boasts a high resolution color screen that clearly displays voltage and battery status, enhancing user visibility. -Alert system: set voltage and battery level limits; the voltage meter will automatically alert you when these limits are reached, ensuring timely intervention. -Temperature monitoring: the automotive battery tester features an integrated temperature sensor that monitors battery temperature in , protecting against thermal damage. -Wide voltage compatibility: this battery gauge meter supports a voltage range of 8- , making it versatile for various battery types and power devices. -Easy to install: designed with a simple 2-wire interface for quick and easy installation, eliminating the need for additional power supplies. Package list: 5 x battery indicator