USB Cable Tester with 2.4" Color Screen for eMarker Reading, PD 3.0/3.1 Detection, Resistor and Continuity Check, Compatible with Lightning, Type-C, Micro-B 2.0/3.0, and Mini-B Cables

I am not going to repeat what other reviewers said. To me it does the emarker reading and continuity tests.It lacks a very critical function though.When you test a USB-A to USB-C cable, the presence of 56k Ohm resistor from CC(1 or 2) to VBUS is important to signal legacy port is on the other end to the USB-C device.Unfortunately this device does not check this resistor value, or at least it does not report it. It has a test for "power transmission" however I cannot verify anywhere that this actually tests the pull up resistor. If I have time I will make a 'bad' cable and test.Frankly, if it shows power transmission "OK" without a 56k Ohm pull-up resistor, this will be straightforwardly a misleading test. I may return at that point. Because those cables can damage ports.

I bought this specifically to test lightning and USB-C cables. When testing the first cable, a chunk of the housing surrounding the lightning port fell off keeping the cable from seating properly. Why is the port made of plastic?

This is a handy little tester that helps you determine the properties of a cable, which often aren't obvious just by looking at the cable. It's very easy to use and although the display is fairly small, it is easy to read because the information is presented in an organized fashion.This tester supports cables with USB A or USSB C on one end, and either USB C, Micro USB, Mini USB, or Micro USB "3.0". Unfortunately it does not support USB B ("printer style") connections or USB B 3.0 style cables. Since those connectors are larger, I believe it would require the tester to be thicker. Additionally, this tester does not support lightning cables.There are 4 "screens" of information which you cycle through by pressing a (very) small button. The first screen is an overshowing if the cable can transmit data and power, and which type(s). The second screen shows the actual wire connections and their status. The third screen shows the cable resistance and can estimate the cable length, and the 4th screen will show the details of an active chip if there is one in the cable.Every computer technician or enthusiast should have one of these in their bag!PROS:* Small and easy to use* Gives you all of the details you need to know about a cable* Flexible and supports a number of common cable types and configurationsCONS:* Does not support USB B, USB B 3.0, or lightning* Button to move between screens is a bit small

I have so many USB-C cables, some bundled with my iPhones and other products, others bought because they promised high data rates. A few are marked with the "Thunderbolt" and seem high end but this tester brought ground truth to the mix. The USB cable tester did what I couldn't do with other testers (primarily line continuity) and instead really spelled out both USB version, Power version, what the eMarker claimed the cable was capable of, etc. As a result, I found most of my cables are straight USB-2 and regardless of fancy wrapper, not even PD 3.0 or 3.1. I now have identified which cables are good for 5Gbps, 10Gbps or 40Gbps+ as well as high power capability (PD 3.1). I wish I had this years ago - it would have made weeding out the multitude of cables much easier. It's a great value - you need this!

This little gadget is what I have been looking for for a long time! I can finally quickly and accurately sort through my large box of USB cables that came with all the electronic products I purchased. Simply read the screen to find out whether the cable supports data transfer and whether it is USB 2.0 or 3.0. Gone are the days of squinting at a dozen LEDs and flipping through a cryptic table to figure out what’s going on. It supports both AAA batteries and external 5V USB-C power. In my tests, both worked well.If I had to nitpick, the USB-A port is a bit tight—though I guess it'll loosen up over time. Also, it's a bit pricey. And the day after I bought it, the seller added a 12% off coupon. I feel like I just lost a million bucks!Anyway, if you are a human living in the 2020s, just add this to the survival kit—right next to caffeine and Wi-Fi.

It’s great. I wish it also had male USB type A to measure extensions but it has definitely revealed when other USB adapters sold here are fake.

Kinda a piece of crap. Tested with several high-end ChubbyCables (as well as others) and, either ChubyCables are all defective or this tester sucks. Couldn't get a single 240w, PD certified cable to test correctly. Couldn't get a single cable to present with an eMarker chip even though they consistently deliver PD power.

I finally organized and labeled my 100+ USB cables. It worked with everything I threw at it. From lightning cables, to USB 4, and thunderbolt cables. I learned a ton about USB cables I would never have known without the hands on experience.Also I asked ChatGPT to teach me how to read the pin configurations, and to explain all the weird things I was finding out. Like a USB C cable’s power delivery can range anywhere from 15w to 240w (I thought all Cs were capable of at least 60w) and with this meter you can tell exactly how much power a cable can deliver.I also found some cables that can only deliver data, and not power.Anyway, dope device. Highly recommend.