Features: 1.HD LCD Display: The improved USB colour tester has a colour HD digital LCD display for clear readings, more accurate measurements and provides more reliable values. 2.Multifunctional: The USB meter tester is mainly used to test USB charging current, voltage, capacity, power and time, displaying accurate data for you in real time; testing the quality of chargers and cables to provide a safe charging environment for your devices. the USB tester can automatically detect different fast charging protocols and is simple and easy to use. 3.Wide Test Range And Simple Operation: Voltage range: 4?30V, current range: 0?6.5A. The large measurement range of the USB meter makes it widely compatible with USB A port devices such as mobile phones, tablets, laptops, car chargers, power packs, wall chargers, cables, etc. The USB A range is compatible with a wide range of USB A port devices such as mobile phones, tablets, laptops, car chargers, power packs, wall chargers, cables, etc., with real time display of loading data. 4.Accuracy and Stability: The internal use of professional instrument sampling circuitry, coupled with unique accurate algorithms, ensures accuracy and stability at both hardware and software level. 5.Small And Portable: The USB tester is small and lightweight, providing a safe charging environment wherever you go. specification:Item Type: USB Tester Product Material: ABS Model: KWS MX18L Display: Colourful Screen Voltage: 4-30V Current: 0-6.5A mAh: 0-999999mAh mWh: 0-999999mWh Timing: 0-99 Hours Power: 0-200W Charge Internal Resistance: 0-999.9 Grouping: 1-9 Groups Positive Voltage: 0-10V Negative Voltage: 0-10V Port: USB PackageList: 1 x USB Tester 1 x User Manual