1、Real Time Display: USB tester to be used to detect USB charging current, voltage, etc.; digital LCD display for clear readings and real time you display data. 2、Quality Detection: USB tester can detect the quality of chargers and cables, providing a safe charging environment for your valuable devices. 3、Measurement Range: USB voltage current tester test voltage range of 3‑30V, test current range of 0‑5.1A. 4、Wide Compatibility: USB tester is widely compatible with USB A port devices, such as cell phones, tablets, laptops, car chargers, power packs, wall chargers, cables, etc. 5、High Accuracy: The USB tester's internal sampling circuitry of professional instruments, coupled with a unique accuracy algorithm, guarantees the accuracy and stability of the product at both hardware and software levels.