Features [Measurement Range] This USB tester can measure DC4 to 30V, 0 to 6.5A, 0 to 99999mAh, 0 to 999Wh, able to test minimum current of 0.02A. [6 in 1 USB Tester] This USB tester displays current, voltage, timing, power, capacity, and battery levels, providing comprehensive monitoring in one convenient device. [High Resolution Screen] Equipped with an IPS high definition color display screen, this USB tester offers a clear and bright visual experience with a wide 160 degree viewing angle. [Guard Your 3C Device] For testing chargers, mobile power lights, and charging devices, multiple data are displayed on one screen, meeting diverse testing needs. [Real Time Readings] Instantly view the status of your USB power source with real time display of voltage, current, capacity, and other essential metrics for quick and easy assessment. Specification: Item Type: USB Tester Material: ABS Current: 0-6.5A Milliampere Hour: 0-99999mAh Minimum Test Current: 0.02A Watt Hour: 0-999Wh How to Use: Click the button to view power, watt hours, and milliampere hours. Press and hold the button for 3 seconds to clear all saved data such as timing, watt hours, milliampere hours, etc. This product has an automatic power off memory function. After a power outage, only data used after 30 seconds can be recorded, and data within 30 seconds cannot be saved after a power outage. Package List: 1 x USB Tester 1 x User Manual Package List 1 x USB Tester 1 x User Manual