UGREEN Bluetooth Transmitter Receiver for 2 AirPods or BT Devices, Bluetooth Wireless Transmitter for Headphones, 3.5mm Aux Audio Jack Adapter for in-Flight TV Car Home Stereo System

Trick to connect, but then works great
I have a stereo that does not have bluetooth but does have a headphone jack. When I work at home, I’d like to have the music on between meetings, but my spouse complains that the music is too loud. (How she can hear my music on volume level 2 on the other side of the house but can’t hear the tv unless it’s above 15 when she’s right in front of it, is just beyond me. But I digress.) The stereo is behind me quite a bit, so getting a long cord for a headphone is not a good idea. I picked this one out because it was on sale and had good reviews.
I’m using it for a single earbud. (need to keep the other ear open for calls and anything else, since I can’t hear when both of them are in). This was a bit tricky as it just would not connect to this earbud or a number of similar ones I have. It wasn’t until I read another review that I got it to work. I’m not sure which was the trick, because I did both of the following at the same time: plug it in to reset it and do this is a space where there are no other bluetooth devices around.
Once I recharged it and had it plugged in and away from anything else electronic, the earbud paired up pretty quickly. It must have been confused by the other earphones, my phone, my laptop, my printer or Bob knows what else in my office that also has Bluetooth.
This thing is going to be a lifesaver, as I work so much better with music at a volume that I can actually hear and not have to wonder whether or not it’s annoying the woman I love. Thank you!!!

Avoid if using for anything other than music
Bluetooth has lag and is inherently less high quality than a wired connection. Them’s the brakes with Bluetooth. However, that being said, this one is a particularly bad example.
The audio sounds like it is being played through the telephone. The lag is ALWAYS at least over one second so if you were planning on using this for anything more than just beaming over music, you will not have a good experience. For me, this lag is incredibly poor. Video watching was going to be my main use for this thing, but having lag just makes it nigh-unwatchable. Not all devices support shifting the audio to fix my issue, either. But I should not have to do that at all.
When it comes to battery life, the manual says it lasts 5.5 hours. Wish it lasted longer, especially for a device being sold in 2023. But whatever, It’s a small device. That can’t really be helped.
But one of the worst things is the awful voice used. I get that they have to give you SOME kind of indication that devices are paired (even though the light on the device can and WILL do the same thing). It’s not so much that the voice is unpleasant, it’s just that it is SO. DANG. LOUD. It will blast “POWER ON”, and “BLUETOOTH CONNECTED” into your ears at full volume. Make sure to put on your headphones AFTER you have turned the device on. AWFUL, AWFUL idea.
They do give you the option to change the voice. Only issue is the only other option is Chinese. An option to completely remove the voice would improve this product.
What a disappointment this product ended up being, especially with the other reviews praising it. Considering how amazingly good those other reviews are, I almost wonder if I just got a borked unit.

Excelente. Muy práctico, portátil y fácil de configurar. Funcionó con mis audífonos Samsung

Funciona perfeitamente. Manual extremamente útil e informativo.
Caso tenha alguma dúvida, basta resetar e tentar parear o dispositivo novamente.

It is nice and useful one. Great packing and enough instructions. You can simply change your Aux port to a great Bluetooth feature to enjoy music and audios.