Price: $9.89 - $7.91
(as of Nov 22,2025 02:43:23 UTC – Details)
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Top reviews from the United States
Reviewed in the United States on May 6, 2025
Reviewed in the United States on May 6, 2025
These USB adapters are fairly accurate. Not totally accurate as mine appear to read the voltage slightly higher than what it should be as confirmed by a more accurate USB power meter. Definitely good enough though.
I like that the display cycles through the voltage, amperage, and wattage. Many just show only wattage. The build quality feels solid and gives the impression they should last for a long time.
The big differentiator for these particular adapters is that they also support data passthrough — up to 80Gbps which is quite significant. Many similar power meter adapters only support USB 2.0 speeds (480Mbps). They also support up to 240W of power passthrough which is another standout feature.
Reviewed in the United States on April 29, 2025
Reviewed in the United States on May 4, 2025
I tested up to 60W (20Vx3A) and 10Gbps with my MacBook Pro and the gadget worked well and didn't interfere with monitor or power delivery.
It can be handy for diagnosing defective cables and power bricks. It helps evaluate wireless charging: e.g. my Pixel charges at 15W, but my Samsung charges at only 5W. And its also generally interesting to see how devices choose to charge when given so many options in the PD spec.
Reviewed in the United States on April 28, 2025
Reviewed in the United States on April 28, 2025
This is advertised an extension, and not a device to be used for measuring power. In testing video and data transfer, transfer speed was the same with and without the device inline. In testing the reported power accuracy of this, while the volts were accurate, the watts were off a little. I have 2 other devices I used to compare the draw of and iPhone and supply of a 65 watt charger. This device shows volts, watts, and amps for USB C devices. It is connected inline, on the end of USB C cable. In comparing this to the other 2 devices I have, the volts were accurate. However the watts were off by roughly 8%. While my other 2 devices were reporting 11 watts, this device only shows 10.2 watts. I also tested on a laptop and the discrepancy in wattage was roughly the same.
This device is small and can easily be carried on a key chain. It attaches easily to the end of any USB C cable as 1 inch extension if needed.
Reviewed in the United States on April 29, 2025
Reviewed in the United States on April 28, 2025
Reviewed in the United States on May 16, 2025
Reviewed in the United States on April 29, 2025
These USB-C adapters are tiny but very useful. A small LED display shows the voltage, amperage, and wattage data to show how much power was pulled from the USB port. The V/A/W data cycled on the display every few seconds. I used this adapter to test the charger and it worked well. I highly recommend this product.
Top reviews from other countries
Nice little USB-C diagnostic adapter, with lanyard hole.
Reviewed in Canada on May 17, 2025
Reviewed in Canada on May 17, 2025
Poyiccot USB C Extension Adapter, 80Gbps, 240W, 8K@60Hz Video, Digital Display, Thunderbolt 5, Grey 2pcs.
These are nice little USB-C adapters which display voltage, amperage, and wattage of the power transfer through them.
They're well made with an aluminum body and nice bright, easy to read, display. I was running less than 100W through them and they did get rather warm and I would imagine that they would get very hot if being run for a while near their maximum rating of 240W. I had no issues running a 10GB/s data transfer, and since they're quite short I would imagine that they wouldn't have issues with higher speeds. These worked well with my PC, phone, and displayed power flow in either direction.
Since I would consider this more of a diagnostic tool than a conversion adapter (different plug or angle) I don't think that most people would be bothered by the heat produced, as it would probably be used short term just for testing.
I did find that it does read a little lower than my other testers, but I think that it's still within a 5% margin, so it should be accurate enough for most.
In my video you can see that the two Poyiccot adapters are calibrated very close to each other (note that they still read the same when reversed)
These are a good value and a great little device to do a quick test for power or charging capability when needed. 5 stars.
Decent USB-C/C adapters, digital LED display, 80Gbps*/240W/8K@60Hz*, aluminum alloy shell, run HOT*
Reviewed in Canada on May 11, 2025
Reviewed in Canada on May 11, 2025
These are decent USB-C/C (F/M) adapters/extenders with a typical aluminum alloy shell and digital LED display/meter that appear to be reasonably well made without visible defect and for the most part work as expected without issues; however, they do become quite HOT after about 3-4 min when running at 140W (see below) . This may or may not be an issue for you depending upon your individual case. They're rated for USB4 v2.0/Gen4 (claimed) and claim to support for 8K@60Hz or 4K@120Hz (4K@120Hz tested) along with a data rate of 80 Gbps (20 Gbps tested) and charging wattage of 240W (140W tested). I should also mention that the claim for 80 Gbps is questionable at best although I don't have any device to be able to test it with at the moment.
My primary use case for these is to provide power and/or data transfer so that's what the majority of tests will be focused on. However, I have to say that one of the primary reasons for the order is in fact the digital LED display/power meter and indeed they to work as expected with respect to that particular feature although their accuracy does leave a bit more to be desired.
≡ Physical build
The physical build quality seems decent with a typical aluminum alloy shell along with a lanyard loop which I do appreciate. The vast majority of these USB-C/C adapters usually have an aluminum alloy shell (most common, such as these), zinc alloy shell, or some other type of plastic and they often do NOT have a digital display like these. The display shows the voltage, current, and power consumed by the device and it automatically cycles all 3 values which I do appreciate and indeed that's one of the reasons for the order, as aforementioned.
≡ Video/data transfer
These are USB4 v2.0/Gen 4 (or at least USB4 Gen 3×2, which is rated at 40 Gbps) rated adapters compatible with TB 4/5 to carry data at high speed (80 Gbps) and in particular, video signals. I don't have an 8K monitor to test but they do work just fine without issues as claimed with a 4K@120Hz for a 27" MSI monitor. Note that 40 Gbps is NOT (at least not without compressions) technically adequate to support 8K@60Hz standard video since 49.65 Gbps is required. UHBR 10 is capable of 38.69 Gbps so it can fully support 8K@30Hz standard video (24.48 Gbps) or 8K@30Hz HDR video (30.60 Gbps) without issues; however, 8K@60Hz standard video (49.65 Gbps) requires DSC or 4:2:2 chroma subsampling and 8K@60Hz HDR video (62.06 Gbps) requires DSC or 4:2:0 to work.
These adapters should be able to support up to 8K@85Hz for standard videos or 8K@75Hz for HDR10 videos without ANY other technologies if they're indeed capable of 80 Gbps.
With respect to data transfer, they're capable of at least 2077.60 MB/s (16.6208 Gbps) during tests (pic 13) which is reasonably decent although it's about 15-25 MB/s less than some others with similar spec (i.e. its aluminum or zinc alloy alternatives). The tests were performed with 20 Gbps M.2 NVMe enclosures.
≡ Quick charging
They support quick charging via PD3.1 as well as all other typical quick charging protocols including the most common ones such as QC 2.0/3.0 or even AFC and FCP/SCP. They support and are indeed capable of 140W via PD3 (pic 4); however, they do become quite HOT after a few minutes running at 140W so that's a bit of a concern for me and certainly a bit of a disappointment in that regard.
≡ Temperature @ heavy load/high power
There is significant increase in temperature during high power/load at around 140W after 5min and that's certainly disappointing to see given the circumstance. For context, a few of these adapters that I have come across and tested have their temperature measured at around 50-55°C (and that's quite hot actually, see below) all the way to 75°C (and most of 'em do have metal shell though). Unfortunately, these are amongst those with apparently poor heat dissipating capabilities (or perhaps undesirable heat generating capabilities).
On the other hand, with respect to power efficiency, these appear to be reasonably well-constructed with little power wasted despite the fact it has a significant temperature increase when running at full load of 140W (for around 10 min during tests). Decent construction usually means less power loss which in turn (usually) translates to moderate amount of heat being generated but that's not the case here.
As a side note, while 55°C might not sound much, consider this; the hot water that comes out the tap from most residential boilers is around 50°C-55°C. I've come across hundreds of these USB adapters (straight and 90° angled of various orientations and dimensions and of different connector types etc.) and I've seen ones that were around 75°C that WOULD burn your hand (as they did to me) which is simply unsafe.
My guess is that these will probably overheat if used in an enclosed space at high power (wattage) for prolonged period of time so be warned.
≡ Wasted/lost power (wattage reduction)
Based on my tests, the wattage reduction is moderate at around 2-3W max which isn't too bad but it's certainly NOT great and it's actually slightly high(er) in comparison to ordinary USB-C/C adapters, but it's somewhat the norm and typical for those adapters or cables with built-in power meter such as these. For reference, typical adapters made of aluminum alloy shell usually have 0.7-1.1W reduction at the lower end and around 2-3W at the highest. The less power is lost, the less heat is generated as a result that signifies an overall good/better electrical design and/or manufacturing process.
≡ LED indicator/power meter
One of the selling points for these adapters is the digital LED display/power meter and indeed that's one of the primary reasons for the order. The LED display is reasonably bright and easy to read and I have no issues with it during the tests although its accuracy does leave a bit more to be desired especially at full load (i.e. 140W).
The accuracy varies depending up on the load and the higher the load is, the less accurate it becomes. At the max load, it's off (lower) by about 3-6W which is somewhat significant although it's still less than 5% in the grand scheme of things and most people most likely won't even notice or care about it. However, just note that it shows a few watts LESS than the actual power consumed when it's over 60-65W.
≡ Value
All things considered, these are reasonably decent USB-C/C (F/M) adapters that appear to be well-made, reasonably efficient, and for the most part work as expected without any issue despite the fact that they do run quite HOT after a few minutes when it's at 140W. As such, these probably are NOT the best option if you need to charge something at over 4.5A (regardless of voltage since the current is that drives up the temperature) for prolonged period of time.
They support and retain all known/supported quick charging protocols, which is nice since some others with similar design (rated at 100W/240W) don't necessarily support 'em. The digital LED display/power meter also works well given the circumstance and it's undoubtedly useful and can certainly be helpful in a number of situations (i.e. to take the guesswork outta the equation). They're reasonably priced at $15 for what they provide and their overall build quality, features, usability, versatility, and performance. Your mileage might vary.
Performance as Expected
Reviewed in Canada on May 11, 2025
Doesn't fit phone through case.
Reviewed in Canada on May 29, 2025
Reviewed in Canada on May 29, 2025
The Poyiccot USB C Extension Adapter 80Gbps, 240W Charging, 8K@60Hz Video, USB C Extender Digital Display came as a 2-pack. You can also get it as a single, but for the price difference, you might as well have two. They are tiny and are prone to getting lost. They have a little loop to add a string like some USB flash drives do. They do NOT provide the string however.
These are a quick way to test your power/charging connection through a USB-C connection. Just insert this in-line with your cable. It doesn't fit the USB-C on my phone with my case on, so a bit of a design oversight. I needed to find a charger with USB-C out so I could insert this at the charger end.
Once connected, it will display volts in bright green digits. Afer a few seconds, it will switch to amps, then on to watts.
With various charging standards and different USB cable grades, this is a good, quick way to check if you are getting what you expect.
I have a lanyard with SD card readers and USB flash drives hanging off it. I'll probably add this to my collection so it's handy when I need it — and not getting lost.
Useful charge diagnosis tool
Reviewed in Canada on May 12, 2025
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