TRN BT20 Pro IEM Bluetooth Adapter,Wireless Bluetooth Earphone Module(no Headphone) (MMCX)

I was skeptical at first, but this Bluetooth adapter exceeded my expectations. It instantly turned my wired IEMs into a high-quality wireless setup, and I didn’t notice any drop in audio clarity. The connection is stable, pairing was quick, and the battery life easily lasts through the day. The MMCX connectors fit snugly with no wiggle, and the build feels solid—not cheap or flimsy. I especially love how lightweight and comfortable the modules are behind the ears. It’s easy to forget you’re even wearing them. For anyone looking to modernize their favorite IEMs without sacrificing sound quality, this is a game-changer. Definitely worth it.

I have a pair of BASN Bmaster IEMs with MMCX connectors for when I do stage performance. They are incredibly comfortable to wear and block ambient noise very well when combined with the comfort foam type tips. However, until now, the only equivalent of this bluetooth adapter was available from Shure that costs almost 10 times as much as these. Pros: These bluetooth adapters have no problem giving enough power to the triple drivers in the IEMs and making them sound fantastic! You will not find a better sound while still comfortably sitting in your ears out of any competing product from Apple, Samsung, Beats, or whatever (believe me, I've tried them) at this price point. For instance, I was using Powerbeats Pros for my workouts and noticed that they keep popping out of my ears because they made the nozzles too short. Instead, these adapters paired with my IEMs can stay inside the ear securely while running, heavy deadlifts and squats, HIIT training, etc with no movement whatsoever which means less time fussing with equipment and more time actually training. They do have a built-in microphone so you can make phone calls and have online meetings. Cons: The bluetooth sytem on these will only attach to one parent device at a time unlike many of the higher priced earbuds that will attach both to a phone and a laptop simultaneously like my Powerbeats Pro. They do not have a manual volume rocker switch like on top of the Powerbeats Pro so you will need to use your device to change volume. This is not nearly as much of a problem though because so much sound is blocked out that you don't have to constantly fool around with volume controls. Disclaimer: I would not use these if I needed to hear outside sounds, like when driving, running in a place near heavy traffic, or otherwise in a situation where I need to be more aware of my surroundings. Note: I'm wondering if the DOA comment person noticed that you need a set of MMCX ear phones to attach to the adapter to get sound out of them.

I got the bt adapters for my in ear monitors and didnt even use them for a whole day before they started cutting out and acting like they have a bad connection.they are a waste of money

Perfect Wireless IEM adapters I love them. Clear audio good connectivity

These fit snugly on my Antlion Kimura Duo Earbuds and sounded great! This model, however, lacks AptX LL support, so the delay was horrendous! I'll be getting a pair of BT30 instead!

Would connect but no sound output.