FiiOUTWS5 2025 True Wireless Bluetooth Earbuds Hook & Headphone Amp for IEMs, AK4332 DAC, Hi-Res 96kHz/24bit LDAC -MMCX/0.78 2pins Connector, 10-Band PEQ, 20H Battery Life (MMCX)

Using the AptX codec, these adapters offer almost CD quality, which, when combined with a good IEM, allows high quality wireless listening.I’ve used them with Sennheiser IE 900 and Final Audio A8000 IEMs and the sound has been remarkable. I’ve also used them successfully with the Campfire Audio Andromeda 2020 IEMs—these are high quality IEMs but I dislike the extremely warm tuning—and I was able to “fix” the tuning with the EQ in the app and enjoy the sound.The DAC in the adaptors is neutral and surprisingly good for the price. Nice detail and soundstage.They are comfortable, even if I’m wearing glasses.My only criticism is that LDAC doesn’t work well enough to use it. But I’m quite happy with the AptX codec.This was a fantastic buy.

The battery life barely lasts 3 hrs on a full charge, the battery dies just as fast even at the lowest volume possible and 3 hrs for me is not enough at all. It's a good product it works just want a better lasting Bluetooth adapter.

As a long time user UTWS3 adapters, I’ve been patiently waiting for FiiO to release a new version of these adapters that solves the charging problems. For some reason, FiiO seems to be the only company who has figured out how to make true wireless adapters that work well and have flawless sound quality. The only issue has been the charging connections being unreliable.But with these new UTWS5 adapters, they have finally created the perfect true wireless adapters for IEMs. The charging system works flawlessly as opposed to the janky UTWS3 that made you jiggle the case until the connectors lined up, and the sound quality is as good as it gets. There is absolutely no hissing noise, and these sound identical to a quality IEM cable. The Bluetooth connectivity is also super fast and reliable. The battery life is solid and the charging time is lightning fast. They are fairly comfortable, and I can even wear them comfortably under my motorcycle helmet and still slide a finger in to press the button to skip songs.I use these with 7Hertz Timeless AE IEMs and the sound quality demolishes AirPod pros or any other system I’ve tried, including over the head headphones. I will probably use this setup for the rest of my life as I genuinely cannot fathom how something else could sound better, and these don’t have any of the Bluetooth/battery/comfort annoyances of literally every other true wireless adapters.Edit: now that I’ve had more time with them, there is one huge frustration. Once every couple weeks or so, the left and right hooks refuse to pair with each other and you only get sound from one of them. This is fixed by holding down the hook buttons on them for 10 seconds until they both say “power on” twice. Then you wait for them to pair, which can take up to 5-10 minutes. Very frustrating that they do this when the previous versions do not.They still sound great and this should be fixable with a firmware update, but they’ve been doing this ever since I bought them.

The software is buggy, the help tips are poorly translated, the connection process isn't easy, the firmware updates have removed product functions, and oh yeah, they lasted less than 3 months of light office use before the left hook just died and now refuses to turn on and isn't recognized by the case. There's no additional troubleshooting or reset options, considering these cost more than standalone earbuds, stay FAR away from these hooks, get a reputable durable brand like Shure.

Works great buy they are apparently mad3 for people with tiny ears. Looping them over my ear causes them to sit at an odd angle, pulling the earbids of of my ears a little, preventing a snug fit. Small ears? They're great. Big ears? Not so much.

Disappointed the case doesn't wirelessly charge its internal battery in this years version, but wireless charging the earbuds should be worth it

=======The Good:The ability to turn any IEM into a TWS is an absolute game-changer for anyone with any IEMs that they no longer use because of being limited to a cable.Great connectivity options and great sound quality. Battery life is sufficient and connection is reliable.I own the original UTWS5 and now this 2025 version and they have allowed me to get more use out of a growing IEM collection.Great compatibility with most IEMs available today. I match these up with my 64Audio IEMs and I'm able to use them around the house and out and about without issue.They are comfortable and lightweight and actually make IEMs lighter to wear and easier to fit than with cables.The 2025 version removed the corrosion-prone connectors and now has wireless charging within the adapters.=======The Bad:These are advertised as supporting LDAC but it's very much a Beta feature that is fairly spotty. I'm hoping Fiio will improve the support of this codec as it would improve sound quality more reliably.The previous version of the UTWS5 had wireless charging on the case - this was shadow removed for the 2025 version so it has to be plugged in to charge.=======The Ugly:The software is hit or miss and I have a love-hate relationship with it. On the one hand, the software enables parametric EQ which is amazing, but unpredictable software updates have added or removed features that I have relied on. I use transparency mode a lot to retain situational awareness and the latest version of the software removed it - I had to downgrade the firmware to get support back.=======Conclusion:This has become a staple for me as an audio hobbyist/audiophile. Despite it's downsides, the convenience it affords me allows me a lot more flexibility with where and when I can enjoy music. I will likely own a version of these adapters from now on and into the future. Other companies have released similar products, and I have tried most if not all of them. Nothing comes close to the UTWS5.