TRN BT20 Pro IEM Bluetooth Adapter,Wireless Bluetooth Earphone Module(no Headphone) (2Pin 0.78mm)

Overall really well done . they paired to my phone instantly and android shows HD audio is enabled when these connect. The ability to swap between the left and right one is very well handled and even the mic is fairly usable (obvs worse than my phone but in a pinch people can still hear me clearly with just one earbud in). The case is a touch on the large side but it needs to be able to fit various iems. I've been traveling with these thrown in my bag for a few months now and so far theyve held up perfectly

They work decently other than the range. You can barely move 2-3 before they start breaking up and beginning to disconnect. It's horrible. Sometimes I'll turn my head and they start breaking up. Other than that honestly they're not too bad. Sound quality is decent with my in eat monitors, the fit around your ear isn't bad too.

Love them. Great sound quality works well with android. Only downside is due to physical size it can be hard to keep in just your pockets. The size does mean that i hardly ever have to think about charging the case though so... Otherwise great product.

The construction of the adapter is very good. I like the way the cable/connector end is integrated into the module itself. Operation is quite easy and pairing is straight forward. The charging case is very nice and I had no problems placing the adapters into the case with the IEMs fitting into the cavity. Unfortunately, the performance of the bluetooth is disappointing. As noted elsewhere, the range of the bluetooth is not great, perhaps five feet or so. I need to hold the DAP in my hands in order to ensure good connection. If I leave it on a table and move more than five feet or so the sound breaks up after a while. To test range I've also used the NALMOPG adapter with my Samsung phone, and I encounter a similar issue with the different setup. Bottom line, I love that the NALMOPG adapter allows me to use my IEM without wires, and like the physical construction of the unit, but ultimately, the performance disappoints.

Works great for the Zero: RED.

This IEM converter works well....until it does not. I have been using this during my 4 day a week workout as well as listening to music. I have found that many times the earpiece for L or R do not make good contact in the charging case and you end up with non functioning earpieces. I have spent a lot of time putting the earpieces in the charging case to find a foolproof way to make sure they make the connection for charging (if not charging the earpieces they keep connected to Bluetooth of my music device). Otherwise these sound good, but it is a crap shoot whether or not you have a good charge on the earpieces, and if you are not charging they will stay connected to your bluetooth device (if in range) until the battery is dead. I also cannot get in touch with the seller for a replacement. RUN AWAY

Really good for the price, and the interior can easily hold some of the largest buds without issue. I noticed that they make particularly sensitive buds like the Wan'ers very slightly brighter than a wired cable, but they're also the most likely to get that 9 hour battery life figure. Otherwise they don't change your buds' sound signature that much, and the mic is serviceable. My biggest complaint is that the case is kinda heavy. (I don't know why Amazon is asking about cable length, these are wireless adapters with a ~30 foot range.)

I previously bought the KZ version of what these are/do, after one day of use I would say these are much better. There are only a few things I would have to say could be improved. 1 the connector pins could be slightly longer to have a more secure connection to the IEMs. 2 the changing case is a bit bigger than I expected. 3 the lowest volume is a bit louder than the KZs, I wear these to sleep, so a low volume is preferred. All in all I am happy with them (so far). One week update: everything I said before still holds up, but one thing I wanted to add is the charging case battery capacity held up for an entire week. I thought that was just amazing and had to add