1Multi Functional: Can test the actual charging voltage, current, and charging capacity, charging time of cell phones and various digital products, and display at the same time. 2High Accuracy: This USB charger tester has precise bandgap reference, accurate range, high accuracy, stable and reliable performance, strong anti interference ability. 3Compact And Portable: USB charger detector is compact and easy to carry, no need for additional power supply and other equipment, plug and play, easy to use. 4USB 2.0 Interface: USB current voltage charging detector is equipped with standard USB 2.0 interface, compatible with various devices, easy to connect. 5Large Range: This USB voltage current power meter has a test capacity range of 019999mAh with a clear display, easy to read measurement results. 1 xUSBChargerDetector