Here is a multifunctional USB digital tester that lets you easily measure voltage, current, power, charge time, and more for USB A, Micro B, and USB C. It has a colorful display that displays your information. Each click of the button lets you see a different readout. The device has 4 connectors, so you can go from Type A to C, Type A to A or Type C to C.
This USB digital tester is compatible with smartphones, tablets, and laptops. It is available for under $25 at this time.