The USB monitor can display voltage, current, capacity and power, press the button to switch among seven different display modes. Has two output: Output I is used for both charging and data transfer, Output II is for large current fast charging. Multifunctions: capacitance checking, capacitance clear, over- and under-voltage alarm, over current alarm and short-circuit alarm. The display is clear and plenty bright enough, two color display with RED & BLUE; High accuracy and ultra-low resistance. A great tool for testing phones, tablets, USB ports, power supply and charger outputs, and current demands of USB devices. It also supports QC 2.0 for 9V & 12V measurement. See more product details