USB C Power Meter Testers, Eversame PD3.1 Digital Multimeter, USB C Voltage Current Voltmeter Amp Volt Ammeter Detector USB C Cable Charger Indicator DC4.5-50V/0-12A，PD2.0/PD3.0/PPS/QC2.0/QC3.0/FCP

I have several of these - beginning with USB Type A devices from way back. This one is the best !! It is a little small; but turns out to be a benefit. The display is large enough - and very readable and the device is slim and not cumbersome. It reads out the PD power values accurately and the display automatically rights itself when plugging it in; right side or left side of a laptop or other powered device. And - it is remarkably durable for a small device. Wish I bought this one 1st !!

In a nutshell: HARD recommend for DIYers and the generally curious. Super strong utility and relatively plug-and-play.So, I originally got this device expecting it to only be useful on a project involving a Raspberry Pi 4B, so I can get a gauge of how much power consumption it has, but knowing the power consumption is so darn important that I find myself using it all the time. I'd connect it inline with my phone to see the adaptive charge rate, hook it up to some HAM radios of mine to optimize the power consumption, and loads of other things. Honestly, this is a hard recommend for anyone who wants an idea of their power consumption through a USBC connector, and doesn't want to fiddle around with the encumbersome clips a multimeter requires. Honestly considering putting one of these in my Cyberdeck, just to keep mental tabs on its power use.

I would probably give it 4.5 stars if we had half stars.I like the device especially that it is bidirectional in that it can be plugged into the charger or the device.It is smaller than I had envisioned but the screen is easy to read. with large letters and high contrast colors.`The 2 buttons are tiny for us handicapped oldsters. They take a short and long press so 4 functions on 2 buttons. A little confusing at first but I just found the setting I like and don't see the need to change it.I don't have a calibrated meter to compare it but my iPhone draws 19.7 W from my 20W charger and 19.8 from a power strip with USB ports. A USB hub, my slow charger measure 7.4W. My Fire 10 draws 11.8 W. These are very close to what I expected.It is also informative to watch a device -charge to 100%. It goes to zero for a few seconds then charges for a few seconds in and endless cycle.making it clear why we should leave it any device plugged in long after charging is complete.

So far so good. It reports volts, amps, watts, direction, and accumulated power. It appears to be accurate--agreeing within a few percent of the reports of other devices in the power supply chain.The auto-rotation feature is sometimes useful and sometimes annoying.The graph feature is kinda lame in my use case. The time scale is way too short for me.It was pretty difficult to figure out how to get into english output mode, but eventually I got there and got it to persist.If I had a wish, I'd wish that it could provide some PD/PPS information, so that we can compare what was requested vs delivered. I took at the voltage and I don't know if it is voltage drop across the cable or poor power supply or simply not requesting the voltage I think it might be requesting.

Very cool gadget. Clear legible display, many features, actually includes readable instructions. Couldn't ask for more, especially at this price. I may buy another one just to have two!

Tiny device, more than accurate enough to tell you what you need to know. Helped me figure out a couple non-functioning "high-power" USB ports.

The readings aren't very accurate but a cute little device and the seller is good.

Works great. It took me a second to figure out how to change from Chinese to English, but it wasn't too difficult. I would recommend buying a USB-C Male / Female extension cable since the device is a bit wider than the spread between my USB-C ports on my laptop. An extra extension cable (mine was 6 inches) solved that problem. Great build quality though.