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."

It's been miss or miss for me with Bluetooth adapter-dongles, where they pretty much fail to work at all - or at least for what I need them to do. For a long time I had no need for them, as all my machines and peripherals and doo-dads were Bluetooth capable on their own, which was a very convenient "fix" for the dongles not working so well. However, when my *new* work PC ended up having no onboard Bluetooth for my BT Bose headphones, I decided to test the waters again one last time. I searched and searched to find one from a familiar name brand, which with little peripherals like this, is kind of a pain in the patootie. Google or Amazon search for "bluetooth dongle" "adapter" or the like and you will get a million and one rando-brand options for $5-15. After some deliberate searching I came across this one. I know ASUS. Not like every ASUS product has worked like a dream, or the brand is free of lemons (I've exchanged a couple GPUs over the years and had a bad MOBO) but I *knew* the name, unlike all the other random "brands" at the top of the search pile. So, essentially, I was a bit wary (due to BT adapter unluckiness) but optimistic (due to brand familiarity). This guy arrived in the mail, I plugged it into the USB slot, dropped in the driver disc, and within a couple minutes (5 tops?) I was able to connect my Bose headphones to my computer. Yay! Why do I like this adapter compared to the others? 1. It was a good deal-- not only because it was cheap, but because it worked! 2. It was pretty much plug and play. 3. Unlike a lot of other generic, import brand dongle things-- the directions were clear. There was no head-scratching, boggling, or Googling trying to find the driver for the whackadoo no-name brand online since the one supplied with the item didn't work. 4. THANK YOU, ASUS! Bottom line: It worked for me where these buggers never have before. All the directions are clear. I imagine if there was a problem with it you might have an easier time troubleshooting and/or getting tech support because the product is an ASUS as opposed to some other random company. If you've been burned before, give this one a try.

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.

Es muy fácil de instalar en Windows 10, es bastante con compatible con los dispositivos lo probé con mando de PS4 de segunda generación, una bocina echo con Alexa de Amazon y unos audífonos headsets inalambricos y funciona muy bien lo recomiendo mucho sobretodo si es para jugar con un mando y oír música

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.

I've had this adapter for over a month and I've learned its ins and outs pretty well. There was a bit of a learning curve. I have it installed on a Win XP SP3 Thinkpad R61, T9300 CPU, 3GB RAM (att to USB 2.0) and also to a Win 8.1 64-bit desktop PC with an Asus P9X79DX motherboard, Core i7 3820 CPU, 16GB RAM (att to USB 2.0 front panel). In both cases the successful method was to download the install package from Asus (http://www.asus.com/ca-en/Networking/USBBT400/) versus the install CD provided. Install the software first, then plug in the adapter when directed. In both cases I have been able to successfully pair with my Philips SHB7000/28 Bluetooth Stereo Headset, which was the main purpose for purchasing the dongle. Performance-wise, this tiny dongle has surprising range, especially given some of the other reviewers' experiences I've read online. With the dongle attached to the laptop located centrally in a 3 floor, 1900 square foot house, I can walk almost anywhere up or down stairs with the headphones on and not lose the signal or even get any break up. Compared to the on-board Bluetooth on my Asus motherboard, which is OK out to about 15 feet, the performance is amazing. But let's remember, this is Bluetooth, an imperfect technology, IMO, especially when broadcasting sound. Pitch fluctuations when listening to my headphones via Bluetooth broadcast from Windows PC's or Android devices, especially the farther away from the source, is an annoying reality. Also, and this may be particular to my BT headphones, you get that little grinding/processing hum in the right headphone that can be somewhat annoying with quieter music. In conclusion, after going through some learning curve hassles that were no fault of the adapter (software installation and connection issues due to noobie unfamiliarity with Bluetooth), it has proved to be a very effective and useful piece of gear and I feel, for the money, it's a very good deal.