Features: 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. specification:Item Type: USB Tester Material: ABS Model: J7 t Voltage and Current Range: 3V-30V 0-5.1A Charging Protocol: Support QC2.0, Compatible with QC3.0. BC1.2, for IOS Voltage Range Operating Temperature: -10-60 PackageList:1 x USBTester NotePlease note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.