This tester fit DC5.5x2.5 interfaces, offering Voltages, current data on screen, making it ideal for various port devices With in mind, it includes overcurrent protections and memory functions, allowing you to track values while ensuring device longevities Whether you're testing computer monitors, power tool, or routers, ensures accurate measurements across a wide Voltages ranges of 4-30V, suitable for both home and industrial applications for enthusiasts, electricians, and hobbyists, this power meter provide insight into device's power consumption and charging efficiency precise and efficient power with the Voltages Ammeter Power Meter, featuring a 0.96inch digital display that supports up to 12A current detection for power fast charging devices