When you need to join or extend a USB c, this is the best way. No loss of audio quality with my microphone.

Great seller

The connectors work as advertised

Seems to do what it's intended to do... connect the pins from one USB-Cable directly to the other.According to my Treedix cable tester (connecting two Thunderbolt 4 cables through the adapter being reviewed), all of the pins are connected. Between taking the photos, I flipped one of the cables to show that that all the pins on both sides of the connector are passed through to the other end by the adapter.This would be a good time to repeat the famous quote, "With great power comes great responsibility!" You can NOT just grab two random cables with USB-C connectors, connect them with this adapter, and expect them to work perfectly.Believe it or not, here's the SHORT version of what you need to know:* Broadly speaking, the main difference between Thunderbolt 4 and USB 4 is, "Everything that's optional in USB 4 is required by Thunderbolt 4". If you want a single cable with USB-C at both ends that's capable of "doing everything" (and cost is no object), grab a Thunderbolt 4 cable. A lesser cable MIGHT do the job, but a TB4 cable will ALWAYS do the job.* If you use the adapter to connect a pair of Thunderbolt cables that are each capable of 20gbps, you can feel very confident that the two cables will work perfectly through this adapter at 10gbps.* If you use the adapter to connect a pair of Thunderbolt cables that are each capable of 40gbps, you can feel very confident that it will work fine at 20gbps, and that 4k60 DisplayPort Alt Mode should work just fine, too. To be perfectly honest, if the total cable length is short enough, even cables that are only claimed to be 20gbps can probably do 4k60 DPAM (perfectly at 1m or less, maybe an occasional 1-2 second black-screen glitch at 1.5-2m).* If you use cables that you know for a fact can do USB 2.0 (basically, any cable that's able to do both charging and 'data')... it should work fine, as long as the total cable length doesn't exceed 2 meters... and will probably be OK up to around 10-12 feet total... but if the charger doesn't support a proprietary quickcharge protocol, you might be limited to 15 watts... and if you are, it's NOT the adapter's fault.* If you use cables that you know for a fact have at least 5 wires and can do USB-PD 2.0... you're probably going to be limited to 60 watts (20v @ 3A) total. Once again, it's NOT (directly) the adapter's fault. PD2.0 won't allow more than 60w unless it detects an eMarker chip in the cable advertising higher capabilities.* When using an adapter like this, if the charger DOES allow you to exceed 60w, the burden is ENTIRELY on YOU to make sure the max power does not exceed the limits of the individual cables and this adapter. In theory, you could plug a Thunderbolt or USB-4 cable with eMarker advertising 240w capabilities into the charger, connect it to another cable of lesser-capabilities than the first through this adapter, and have the adapter and/or second cable go up in smoke if the charger tries to deliver 240 watts. It's unlikely to happen anytime soon (AFAIK, chargers even capable of 240w don't actually exist yet in early 2025)... but you NEED to know this, and understand the limits of everything between the charger and device. Using an adapter like this removes the guardrails that would normally protect you from making a mistake. When you remove guardrails, you MUST know why you're doing it and understand exactly what's going on "behind the scenes".* USB-C cables with only two wires are real and exist. They can only deliver 7.5 watts (5v @ 1.5A). If you bought some random trinket that's USB-powered and doesn't use USB for data-transmission, its cable PROBABLY falls into this category.* It's entirely possible to use an adapter like this with a pair of USB-C to USB type A (rectangular) cables to end up with a type A connector at both ends. Officially, that's taboo. If you do it, make sure you fully understand the reason WHY it's officially taboo. For the love of god and everything holy, DO NOT try to directly connect two COMPUTERS via USB. At best, it won't work... at worst, you'll fry one or both USB controllers. The one scenario where A to A (with C through this adapter) is likely to be OK is if you're connecting a computer to a KVM.If all this sounds complicated... well, it is. Most cables are poorly labeled, and the overwhelming majority of USB-C cables capable of "data" are only USB2.0 (including nearly all cables bundled with new mobile phones... even EXPENSIVE ones). When using an adapter like this, your cable chain will only be as strong as its weakest link... and when using an adapter like this, it's 100% entirely YOUR responsibility to understand the limits of those cables.

works.keeps charging battery

These are all metal I used a few of them to connect several long 10ft charging cables to send power to my alarm hub.Very nice build however 4 units had some over flashing of the rubber or plastic that holds the connector into the metal housing. It appeared to prevent the plug from going all the way in so just use your fingernail to scrape it off, blow it out and eyeball it to make sure no pieces are in the connector.I had no issues with those 4 after that. Not a big deal if you are aware of it.I had no issues running data from my phone to my laptop however I do not know the speed of my phone as a USB drive to test speeds. I feel like as long as the cables you are using are good you should be ok to a certain length then you may get lower speeds on high speed devices like 4K cameras or hubs. Each case is different, but match you wrire speeds if you are going to link two USB-C cables together.For me I am mostly going to use these for power.This pack was the best value at the time of purchase and came with the most pieces.Thanks!

Perfect for the application

For 5 adapters this is an unbelievable price. I was skeptical of the video pass-thru capability since they lack the Thunderbolt logo but they work with 2 Thunderbolt cables to an HDMI adapter to display video from an iPad Pro and 4K video from a Dell laptop.