DROK USB Tester, USB-A USB-C 2.0 Multimeter Dual USB Ports PD QC 3.0 with Color LED Display Battery Charger Monitor, 7 Modes Capacity Voltage Current Power for Laptop Power Bank Phone Solar Panel

Simple setup and operates as described.

Set this up on my bench to evaluate (while evaluating some USB supplies) and noted this device was saying 5.1V when my (very accurate) Fluke multimeter was saying 5.4V.... not real accurate, but as always, you get what you pay for... at least it's in the right 'area' of voltage... I haven't evaluated the current measurement yet... guessing it'll be about the same.I can recommend this if you just want to know if the USB port is 'working' and in the range it should be...If you're expecting super accuracy, you might need to spend more $ than this.

I tested it on various devices and found no flaws. Compared readings against a digital multi-meter setup on my test bench. Data pass-thru only works via the USB-C path. I only verified the accuracy of voltage and current and did not verify any other of its functions (capacitance & power). For the cost, it's a very compact/portable solution for what I need.

I have the USB-A version of this and love it, but I needed USB C support so I though this wold do the trick.It's got two major design flaws making it not usable in many instances.1) Despite what the manual says it can only pass date from USB C in to USB C out. If you use the USB A in or USB A out it will not pass data only power. Manual implies that UBC out will pass data, USB A out will not but either in will. So for USB A it's good to check charging current but not device current usage. A lot of devices don't to into full power usage unless they also have the data pins2) A common problem these days is some cables with excessive voltage drop in them for I current devices. So I really want to put this at the device side of the cable, not the source side, but the cabling needs USB B input for that to work and it doesn't have USB B input.So this device is good to measure charging current for a solar panel, or brick charger to a USB bank etc, but not for device usage current.

I've been able to determine that two cords were bad (no current would flow), and 5+ cords were good (current would flow), and multiple ports were good (Voltage exists and current flows in good cords), and one port was bad (no voltage).This tool has earned a place in my electronics toolbox. Too many cheap USB cords and ports are being made (or ESD is killing them), and this tool is so helpful to determine what the problem is.