Features: Accurately monitor voltages (4-24V), current (up to 6.5A), and power output in real time with this USB tester, for fast charging verification across smartphones, tablets, and power banks. The aluminum housing houses a LCD screen that dynamically displays charging, while built in data logging captures performances trends for detailed analysis via companion app software. Ideal for technology enthusiasts, electricians, and frequent travelers seeking to validate charging efficiency, troubleshoot slow charging devices, or optimize power delivery systems. Use it to test USB wall adapters, and power strips at home, in workshops, or during trips to ensures compliant fast charging and prevent overvoltage risks. Combines lab grade precise with portability, offering overload protective detection modes to safeguards both the tester and connection devices during prolonged diagnostics. Specifications: Component: ABS. Size: 77x38.6x14mm/3.03x1.51x0.55inch Weight: 87g. Monitoring voltages: 4~24V. Monitoring current: 0~6.5A. Monitoring power: 0~156W. Load equivalent internal resistance: 0~9999.9Ω. D+/D - Voltages: 0~3.3V. Package Includes: 1pcs USB Power Meter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.