ASUS USB-BT400 USB 2.0 Bluetooth 4.0 Adapter

I picked up the ASUS USB-BT400 Bluetooth adapter way back in 2018, and honestly, it’s still running perfectly in 2026. I’ve built and upgraded a lot of PCs, and this little adapter just keeps working. Connectivity is solid—I haven’t had issues with my headphones, headsets, mice, or controllers dropping out. Everything just pairs up and works, even when I’m swapping devices around for gaming or work. The only exception is my Fire tablet, but that’s not really the adapter’s fault. Some devices have built-in security (like locked bootloaders or pairing restrictions), so they just won’t connect to anything that’s not an approved peripheral. That’s a tablet-side thing, not a problem with the ASUS adapter. Latency has never been an issue for me, even with my high-DPI Razer Basilisk gaming mouse. No noticeable lag, even when I’m gaming or moving between devices. If you’re chasing the absolute lowest latency for competitive gaming, maybe a Bluetooth 5.0 adapter would have an edge, but for my setup, this one is honestly great. I don’t see a strong reason to upgrade when everything just works. It is a great value, it's supported by windows out of the box, it's very small too. The adapter is still going strong after years of daily use, no defects, no weird disconnects, nothing. It’s just a solid, reliable piece of hardware. For anyone needing Bluetooth on a desktop or upgrading an older PC, I definitely recommend it. Still using mine in my current rig and it hasn’t let me down. PC builder, gamer, and tech junkie approved!

The ASUS USB-BT400 Bluetooth Adapter is a versatile and reliable solution to upgrade your PC or laptop with Bluetooth connectivity. Whether you want to connect wireless peripherals, transfer files, or simply enjoy the convenience of Bluetooth, this tiny dongle has you covered. One of the standout features of this Bluetooth adapter is its ease of use. It's a 'plug and play' device, which means that it's incredibly simple to set up on Windows 10/8/7/XP. You just plug it into an available USB port, and your computer recognizes it automatically. This quick and hassle-free installation is a big plus for users who want to avoid complicated setups. The adapter supports a wide range of Bluetooth devices, including printers, phones, headsets, speakers, keyboards, and controllers. This versatility makes it a valuable addition to your PC, enabling you to connect various peripherals and accessories without the need for multiple adapters. Despite its compact size, the ASUS USB-BT400 delivers reliable and stable Bluetooth connections. Whether you're streaming audio to wireless speakers or enjoying lag-free gaming with a Bluetooth controller, this dongle ensures a seamless experience. ASUS is known for its quality and durability, and this adapter is no exception. It's built to last, and you can trust it to provide long-term Bluetooth connectivity without issues. The sleek black design of the dongle blends well with most computer setups, and its small size means it won't block adjacent USB ports or get in the way. In conclusion, the ASUS USB-BT400 Bluetooth Adapter is a cost-effective and efficient solution for adding Bluetooth connectivity to your PC or laptop. Its 'plug and play' setup, compatibility with various devices, and reliable performance make it an excellent choice for users who want to enjoy the benefits of Bluetooth without the fuss."

Had to buy after my bluetooth went out on my PC, and cords weren't cutting it. It gives great quality sound and works great. Make sure you follow the instructions and disable your old bt before plugging it in if your pc had one. When instructions are followed it works perfectly and only takes like 2 min to setup. I messed up the first try and plugged it in first and had to go back to the instructions.

I rarely do these reviews, and I am going from a competitive gaming view so take it as you will. Now, I am a huge critic of reaction time and while this little ASUS usb isn't bad, however it's not 1:1 instant. Yes, by all other functionalities it works just fine. It is easy to use, most equipment I have attached it to has been compatible. By the layman user it is the perfect tool, however if you think about using it for gaming on high tier level, I'd just stick to cable. Would do 4.5/5 but that isn't an option, great product overall though!

It does its job and is perfect. I am a little clueless when it comes to setting up computer technology but did the easy bits ( inserted disc, clicked run, finish etc ) and the fine tuning was done by ASUS support. Forget the negative feedback regarding this product (I use Windows 7 & no issues, laptop in one room speaker in another so range good ) Very happy thanks Asus.

Después de comprar más de 5 adaptadores chinos, me decidí a comprar un buen adaptador de marca. Este adaptador BT Asus es excelente. La señal es fuerte y de buen alcance, no hay Lag, no hay desconexiones. Lo utilizo para mi control 8bitDo Pro 2 y funciona de maravilla.

Works with Steam and all that perfectly fine (keep in mind a lot of games outside of Steam won't recognize a PS4 controller so you'd need the DS4Windows application, but that's another topic). My PC instantly recognized the dongle and after following the simple instructions of downloading and extracting the driver file (with a straightforward setup wizard exe inside), was able to connect my controller first try hassle free. Also nice is that when I turn off and then turn on bluetooth, it remembers the controller fine as it should so no issues there either. Oh and in terms of range and responsiveness, idk if it's a placebo but it seems faster (more quickly responsive) than using my wire and I was even able to get the same functionality upwards of 6m without walls. Ah and of course it supports more than one device at once (not just pairing). Going to update if there are any issues over the next few months. Edit: Had a load of issues with DS4Windows and Steam, constant disconnects after at one point updating drivers through Windows manually, what I learned, don't go to Windows and have it automatically update and choose drivers, go to the site ASUS provides and do it (which is what I had done in the first place but of course I had to play around with things and muck it up), fixed all the strange issues.

I'm using this on my desktop PC for my Bose QC 35 II and Xbox One controller. The Bose have about 100ms of latency or so which is because of the headphones themselves, not usable wirelessly for gaming because of this reason. Fine for anything else, just adjust your audio sync by -0.1s in your video player. The controller works very well. Hard to tell, but I think there's about 10ms input lag which is about to same when it's wired. Win win.

Absolutely perfect and better than I expected. Highly recommend this product.