FiiO UTWS5 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 (0.78 2pins)

I badly wanted to love these, as they were exactly what I was looking for in a Bluetooth iem module. But sadly as many other reviewers have said in various places around the net, STAY AWAY from them. They are either being plagued by poor battery chemistry (supplier) or there's bugs in the charging firmware. I've tried two sets now and both (the second being worse) have been plagued by battery charging/runtime problems. I've tried everything to reset them, to no avail. I was talking with fiio support person, still no help. Sadly I'll have to look at other options.

The magnetic charging of the case is a GREAT feature compared to typical charging cases that fail often. But charging cases are terrible for portability because they are basically just powerbanks nobody actually needs since they have phones and other power sources available. The case just takes up a lot of weight and space in a bag and it's just another battery to die eventually. There should be a way to charge the earhooks directly with a usb cable. This problem applies to almost all devices like this. This Fiio unit is clearly the only game in town for bluetooth IEM earhooks. The app is very good and the build/hardware of the earhooks is great. It does actually work pretty great. It has volume control on the earhook buttons, which some bluetooth earhooks from KZ, Moondrop, etc do not have and I consider that a serious dealbreaker. The case is the real problem for a few reasons. It's big but there's a lot of dead space inside. The biggest issue is that it's too shallow for some IEMs. I have several IEMs and some of them don't even fit inside the case. Depending on the size of your eartips some IEMs won't fit. I've been using this with Decet IEMs with foam eartips and the case lid just barely fails to close all the way when the eartips are new but after they shrink a tiny bit from use the lid closes fine. It's crazy that the tolerance is so low for different sizes of IEMs and eartips. It really just doesn't work at all with some models and it's gonna be hard to find out in advance if your IEMs fit unless you happen to find someone online giving that info for a particular model. And of course it's impossible to use this with custom eartips like Eartune. You'd had to take the eartips and and off every single use to put the IEMs back in the case. That's the biggest reason why the charging case design is terrible. The optimal design for bluetooth earhooks would allow the user to put everything in any case, customizing the size/style/materials to their individual taste/gear--and charge the earhooks directly via cables. There was a halfway good solution to this problem from Moondrop a couple years ago I think, where the charging case was a modular 2 part system. This product category really needs a major design overhaul in terms of case/charging. It's still a very usable product with some great points in its favor and I'm a fan of Fiio's quality and innovation in general. I have actually decided to abandon this earhook approach and use their BTR11/13/15 dongles worn as a pendant instead. It's a tradeoff but it allows me to use custom IEMs conveniently.

I enjoy being able use use my iems wireless. And these are the best I've seen for the money. They appear to be constructed well. Magnets for charging seem to be strong. And should of course is much better than any other earbuds in my opinion.

Tired of your KZ TWS adapter, with its high noise floor, latency issues, and poor codec support? I certainly was, I ended up buying these after being severely disappointed with both the KZ AZ09 and AZ20, being not just the cheapest offering I could find that wasn't KZ, but the only one I could find from a brand that hasn't burned me in the past. And other than one quirk, these have yet again failed to disappoint me. Yes, if you caught that double negative, I am very happy with them. LDAC, no latency issues, good fit around the ear, easy connectivity that so far seems consistent, no questioning whether the case lid would properly turn them off like with the KZs, and most surprisingly, EVERYTHING, save for the ear loops and hinge, seems to be pot moulds of magnesium, I think I felt my eyes pop out of my skull when I first saw that the case wasn't all plastic. Granted, given the all metal shells of both my FiiO KA15 and my BTR17, I honestly shouldn't be that surprised that they're consistent about that. There was only one thing I had an issue with, the reason they're four and not five stars, and I solved that with some effort; the metal colored rings that mark each side at the connector, are way too big, both of my current IEMs failed to fit on with them in place. I had to dig at them with my nails pretty roughly to rip them off, and the IEMs fit perfectly after that; Not just any IEMs, two of the most popular sub hundred dollar choices, being the Truthear Hexa, and the Moondrop CHU 2, yes I know this costs more than both of those IEMs combined. So if they don't fit the sockets on those with the color rings on, there is likely a pretty large pool of IEMs that won't fit on these without at least ripping those rings off. Of course, do it at your own risk, my set ended up being fine but there is always the chance you could end up ripping the connector off, it's really that tight of a fit.

Ldac does not work, not suitable if goal is decent audio Aptx or AAC isn't good enough Aptx adaptive isn't on pixel or Samsung either. Maybe future firmware will fix LDac but as is, not good enough Fits well, I use it with the TV but that all it's capable of .

I don't know if I got a dude or this 0.78 pin version is just a one-off dude, but I got the MMCX version of this and it shipped fast and worked perfectly Then I had the same expectations of the 0.78 dual pin version of the same thing. This 0.78 pins version was a dude. It charged very slowly and instead of a white front light it was red. I noticed also that this unit had three brass charge ports on the bottom side of the headphone earpieces and the earpieces wouldn't charge unless they made contact with the charge case and a piece of plastic was removed from the bottom of both earpieces covering the three buttons. The mmcx version didn't have this and charged inductive, so its liie the 0.78 version was a prototype/earlier version. The documents said the same thing as the MMCX version, but the hardware is definitely different and by my estimation,inferior. I don't fault the seller, it is a fiio issue or supply chain issue. So mmcx version of this, good; 0.78 dual pin version, baaaad at least for me. I thought about ordering another one but Amazon already has me on the short list for too many returns so I don't want to risk ANOTHER return (plus I don't buy used versions of products on Amazon anymore as alot of my returns were those. But this product was shrinkwrapped new, just seemingly a dud/oddball from the factory (i hope...) again, not a seller issue its a manufacturer issue or QA from the factory or they simply sell inferior versions as 0.78 dual pin and the good ones/better ones are mmcx.

They work great but are apparently made for people with tiny ears. Mine are not. Looping them over my ears cause them to fit at a weird angle, pulling the earbuds out my my ear canals a little, causing them to fit less snugly than they should.

Trying to balance out the bad reviews. These make multi driver IEMs sound amazing. You MUST go into the FiiO app and increase the volume there manually. You have 4 separate volumes going on. 1. Your phone/device volume. 2. 3 independent volumes in the app. Music, tones, and calls. If you increase the music one to full or one notch below that’s when you get great power for multi driver IEMs. Connection quality is solid. Case is metal and premium. Hooks charge wirelessly within the case. Plenty of room for large IEMs. Case is gigantic you won’t keep it in your pocket unless you have cargo pants. Other thoughts: 2 pin connectors is outdated and needs replaced. Not all IEMs are created equally and some fall off the hook VERY easily. We need some kind of locking mechanism, or a way to screw them in, anything that could secure them besides just the pressure of the pins in the holes.

Right hook wouldn't pair/connect despite trying every method advised/outlined online