1.44 Inch USB3.0 LCD Color Display Tester, 6 kinds colorful measurement interface Adjustable Multiple Perspectives. User manual and Android APP download link: http://www.mediafire.com/folder/5c877rc21tp1p/UM34 Real detect charging status of USB power supply, voltage, current, capacity, temperature and etc. other multi-function multi-data measurement display, high precision comparable professional equipment. At a glance, more convenient. ?Quick Charge Recognition?USB 3.0 port support OPPO phone VIVO, Quick Charge Recognition Mode: QC2.0/3.0, for i Phone 2.4A/2.1A/1A/0.5A, Android DCP ?Rotate the screen in 4 directions?When working in Different directions, always keep in the best view. Support 18 Kinds Language(English, German, Polish, Chinese and etc. ). Free to set theme Color, 64 kinds of choice. Product comes with help interface. ?USB, Charger, Power Bank, Car Charger Detection?Differential pressure method for measuring cable resistance. Because of cable and load internal resistance, there may be voltage error. When you connect the load, the display value decrease to some extent. And different cables have different voltage drop consume, so we can detect the voltage drop of cable to check the quality of the cables. You also can identify the quality of power bank good or not and judge the capacity of power bank.