The LMP USB-C Power Tester Multimeter can be used to measure the power flow by showing its direction, the voltage (Volts), current (Amps) and wattage or power consumption over time (mAh). Simply attach the Power Tester Multimeter between the host and the USB-C cable, adapter, dock or device and it will make visible all power data on its OLED screen. It is a great helper for IT engineers and just about anybody who wants to know where and how much power is flowing between USB-C devices.