Features: Experience precise and efficient power monitoring with the Voltage Ammeter Power Meter, featuring a 0.96inch TFT digital display that supports up to 12A current detection for power fast charging devices. This tester fit DC5.5x2.5 interfaces, offering voltage, current data on one screen, making it ideal for various port devices. Perfect for enthusiasts, electricians, and DIY hobbyists, this power meter provide insight into device's power consumption and charging efficiency. Whether you're testing computer monitors, power tool, or routers, ensures accurate measurements across a wide voltage ranges of 4-30V, suitable for both home and industrial applications. With safety in mind, it includes overcurrent protections and memory functions, allowing you to track values effortlessly while ensuring device longevities. Specifications: Material: ABS Screen: 0.96 TFT Color Display Testing Ranges: Current: 0-12A Voltage: 4-30V Power: 0-360W Capacity: 0-666666mAh Time: 0-99 Hours Size: About. 60x20x12mm/2.36x0.79x0.47in Package Includes: 1pc Digital Tester note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.