The IZTOSS 12V-24V Universal Digital Voltmeter is designed to measure voltage levels between 7V and 30V, making it suitable for a variety of vehicles including cars, motorcycles, boats, and more. It features a compact design with a 3-digit LED display that provides clear visibility of battery voltage. The voltmeter is equipped with a low-voltage alarm that activates when the voltage drops below 11V in 12V mode or 22V in 24V mode, ensuring timely alerts to prevent battery issues. The device is self-powered from the measured DC voltage and includes reverse polarity input protection for added safety. Installation is straightforward, requiring a 30mm mounting hole, and it comes with a nylon retaining nut to secure the meter in place.