YWBL-WH USB Tester 10-in-1 Digital LCD Display Voltage Current Power Meter with Power Outage Saving, Memory Charging Capacity for USB Charger Detector Ammeter (White)

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• [REAL TIME CHARGING MONITOR] Simply connect this USB tester to your device's charging port and instantly view voltage, current, and capacity on the large LCD screen. No complicated setup is needed, just plug and play to track your phone's charging status in real time, giving you complete control over your device's power consumption.
• [INTELLIGENT POWER OUTAGE MEMORY] Equipped with 9 independent memory sets, this meter automatically saves the mAh input from up to 9 different charging devices even after a power loss. Easily historical data to verify if your charging device's reported capacity is accurate, ensuring you always know your battery's true performance.
• [MULTIFUNCTIONAL DETECTION TOOL] Beyond basic charging data, this device doubles as a diagnostic tool. Detect U disk working current (50 100mA) to identify potential faults when current exceeds 100mA. Additionally, measure USB port voltage output to ensure your computer's USB port delivers the standard 5V±5% and proper current levels.
• [USER FRIENDLY CALIBRATION SYSTEM] Customize your readings with the built in voltage calibration feature. Simple button controls allow you to increase or decrease the displayed voltage and perform automatic current calibration. The system then saves your settings and returns to the main menu, providing accurate measurements tailored to your equipment.
• [COMPACT AND VERSATILE DESIGN] With a small footprint of just 56.6x24.7x11.2mm and weighing only 13.9g, this durable ABS tester is perfect for on the go use. It supports a wide range of measurements including 0 5A current, 4 30V voltage, 0 150W power, and 0 mAh capacity, making it an essential tool for any tech enthusiast.