Upgraded Bluetooth 5.3 Transmitter 3-in-1, Portable Wireless Rechargeable Transceiver Adapter for TV PC, Stereo Audio Receiver for Car Speaker System

Super easy to connect to my old Sony mini system and it sounds great! Winner!

This product does it's job as advertised. I can both send and receive bluetooth audio (though not both at the same time).This is great for using my non-bluetooth headphones with my iphone. I was pretty upset when apple did away with the 3.8mm jack. This handy device allows me to use some of my better wired headphones so I can bop around the city looking like a character from the 80's. It also allows me to use airpods with my old clickwheel ipod classic when I want to listen to music on a superior device and not have to be tethered in.As with any bluetooth device, there's a slight loss of audio quality. It's not noticeable unless you were to directly compare this between the same exact headset/speaker hardwired into your device. This isn't a shortcoming of the receiver, just something that happens with bluetooth overall.There is also a slight delay. I've played music over my stereo and plugged this into the headphone port to transmit the audio to a bluetooth speaker in another room. When walking between the rooms you can hear that there is a noticeable lag in the audio of probably 200ms or so. This isn't an issue if you're just listening over headphones and the lag is short enough that it wouldn't even make a difference if you were watching a movie, but I wouldn't use this if I was scoring a film which relies on getting audio to sync precisely at a frame by frame resolution. Then again, if you're scoring a film, why are you using bluetooth?All in all, great device. I was impressed enough to buy one for my girlfriend as well.

This product works great for non real time audio where latency is not an issue. Sound quality is great. Pairing is flawless (at least for the Apple Ear Buds). But ... for real time audio as in a studio situation, there's at least a 50 msec delay, maybe more as I had no way to measure (and I spent little time checking further after I noticed the delay). Using to monitor an instrument or vocal in real time just does not work. There does not seem to be any way to reduce the buffer size and therefore delay. I will keep looking. My fault for this ..... for not checking so it will just go in a drawer and maybe be used for some future one-off application. Thought I'd let you know.

This product, although it did connect easily enough to multiple Bluetooth devices (which was nice), came with a terrible distortion of the Audio. There was both crackling of the audio output with buzzing noise constantly present.This is was likely due to poor assembly, of the unit itself, as I tested the provided 3.5mm cables (as well as a higher quality cable - purchased separately), with alternative devices for both input and output functionality, and the issue was only present on this device. I also tried several different USB cables just in case.My guess is that the issue was in the 3.5mm Audio Jack (Female) on the receiver/transmitter itself, which was either poorly manufactured and not making a good connection, or was poorly soldered in the wiring.This unfortunately made all other aspects of the product moot points. With an item such as this at such a low cost, I was not expecting the greatest results, but I did not expect the simplest of aspects to be of such poor quality. This may have been due to a bad batch of components, a novice assembler, but it clearly did not receive sufficient QC testing even at a low level.Could it have been damaged in transit? Yes, but the unit was not damaged, it was extremely light, and if the soldering came loose in transit, than the soldering job was sub standard.I could have requested a replacement, it could have been a bad unit that slipped through sub-assembly, but this is literally the simplest part of the product for both assemble and testing.If you are looking for a very cheap alternative to more expensive comparable products, you can give it a try, but I would not expect much here. If you do try it and receive a unit that does not have the same issues I had upon arrival, I feel it is safe to assume the products longevity would be very limited, and failure would be more likely than not to occur especially if you are plugging and unplugging the unit into different devices.Rated a 2-star because Bluetooth connected seamlessly, which was the only plus I can provide it.PASS on this item unless the Manufacturing can resolve such a basic issue.