The USB Power Tester lets you monitor the power draw of any USB Device - Phone, Charger, Power Bank, USB DIY Project, etc. Just plug it in-between the USB Power Supply socket and the USB Device to be measured. This tester can sense, display and monitor the following features of the device like - Voltage, Current Draw, Time since on, Battery capacity, Power Consumption, Electrical energy, Resistance, Temperature,etc. This module plugs in between the USB Port and the USB device and reports the power consumed by the device. This module is great to measure the power supplied by a power bank, the power consumed by a USB DIY Project, Power Consumed by Arduino/Raspberry Pi projects through USB, etc.