MakerHawk USB Multimeter USB Voltmeter Ammeter Load Tester USB Voltage Current PD Battery Power Capacity Charger Type C Meter Tester LCD Display Cable Resistance QC2.0/3.0/4.0 N20 1.54 Inch Screen

My experience with the MakerHawk USB Multimeter can be summed up in one phrase: "works well after I figured out how to use it." When I first unboxed it, I was a little overwhelmed by the amount of information on the screen and the various buttons. There wasn't a clear, intuitive path to simply measure voltage and current right away, and I felt like I was fumbling through the settings. It definitely required me to sit down, read the instructions, and look up a few videos to understand its full functionality.Once I got the hang of it, however, the device proved to be incredibly useful and accurate. It's a powerful tool for anyone working with USB devices and power delivery. I've used it to test cables, monitor charging speeds on my phone, and troubleshoot power issues with small electronics projects. The ability to see real-time data on voltage, current, power, and even the total energy consumed is invaluable. The screen is bright and easy to read, and the rotating display feature is a nice touch.Despite the initial learning curve, I can now confidently say that the MakerHawk USB Multimeter is an excellent piece of equipment. It's a reliable, feature-rich tool that provides the data you need to ensure your USB devices are functioning correctly. The frustration of the initial setup has been completely replaced by the satisfaction of having a powerful tool in my kit.

Works great

The vendor only has instruction in Chinese! You can google TC66c.pdf and find English versions. Even so, the instructions lack a lot of detail, and use inconsistent terminology.OTOH it solves my issue nicely (measuring raspberrypi power).

This is one of my favorite purchases from Amazon in a while. I didn't realize how much I needed it until I had it. I was able to go through all my cables and purge the ones that had some bad internal connections, was also able to check on some USB power banks, and also test each of my USB wall blocks. It's amazing how much you learn in a short time about your different chargers and cables and how different they can be. Some wall blocks put out too much voltage (which is why I bought this tester, because I had a brand new wall block fry a security camera by putting out too much voltage), and it's also fascinating that some cables seem to intentionally provide imline voltage control even one paired with a wall block that is putting out too much juice. The device itself is really easy to use and has lots of intuitive features. This was money very well spent for me and although I'll probably never use it as much as I did in the first 24 hours, it's a handy thing to have around because it's hard to test USB stuff with a regular meter. Mostly it's just cool as all get out.

This is easy to read and go thru the menus.

First, FYI: The "Product Catalog--Read and Download.pdf" on the Mediafire web site referenced by the QR code on the USB meter package gives you links to where to find manuals, PC software, and Android apps for your model tester.Me, I bought the A3 Bluetooth meter. On the positive side, the readings on it match my Fluke 77, and my other USB tester doesn't. So seems accurate.On the negative side is the Bluetooth functionality. It will probably suffice for me, but just barely. All I want to do is check the USB voltage and current on a device sealed in a box. Because I can't see the meter I want the display on the meter to be turned off. Check and check with the Android app.However the Android app's graph readings go crazy after awhile (2-1/2 to 13 minutes so far for me). The readings on the device's display stay stable. Since I will just need to do a quick check once in a while, no problem for me. Re-running the app will correct the readings for another few minutes, but don't look to monitor things full time with the app!Also, the settings for things like device "Screen Off" keep changing from app run to run too (0 is 'always on', FYI).A note at the top of the "Product Catalog--Read and Download" page says there is an iOS app, but as of today 10/22/22 I can't get it to work. The app can't see the device, nor can the iPhone's Bluetooth settings.So neither app is working very well, and don't expect any updates. The Android app you can download from the Mediafire site is 4 years old. I think the "E-Test" app on Google Play is older. I don't see a date on the iOS app "E_test", So I don't think it has ever been updated. The only review there is 2 years old. Neither have good ratings.So buy for the meter, but skip the Bluetooth unless you have simple needs like me. :-)

This works great, this is what you need to test hold adapters. We were amazed on how bad the old adapters voltage and amperage have deteriorated.

When plugged into USB C, screen just flashes. I flipped the cables around to get it working but took multiple attempts to get the screen to stay on. Phone is reporting its slow and rapidly charging in a loop. I would test this hard within the first month before you're out of the return Window. I'm lucky this went out within a few days of testing.