UGREEN Bluetooth AUX Adapter Built-in Battery, Support Dual Pairs Bluetooth 5.3 Receiver for Old Stereo, 3.5mm/ RCA Dual Channel for Home Stereo Speakers

Product grants what it offers. I connected it to my old model Sony 3+1 home theatre system. I needed a bluetooth adapter to connect that old school sound system to my brand new Nebula projector and i ordered that device. I connected it to the audio output of the bluray player, which also works as the amfi of the system, and it synchronised easily and successfully. No disharmony or discordance between the sound and image. It works really on time. Sound quality is satisfactory however there is a deep noise which is audible when nothing is being played. Once you turn on the sound you don't hear it. Which is quite acceptable for a 11 USD device.

Bluetooth can cut out, but it's rare. Hard to know if it's the rcvr or something with my phone. It does have a friendly voice saying "connected" right before playback. Otherwise, I can say it faithfully connects for hours on end. For best results, don't move the phone around too much during playback. Set it on a table or countertop. I have an older phone used just for music, which sits 2m away on a charger. If there's a problem, it's usually bc the playlist ended or a power spike caused a reboot. This one is best suited for HiFi audio systems using end-to-end RCA cables (wht/red). Mine is hooked up to the input for "CD". Tried "TAPE", but the signal had too little voltage. Any input marked "AUX" should also work well. The single button controls it all; long push to flash the light red/blue (pairing), which also shuts it off after a long press. Once connected, the button acts as play/pause, but no skip function.

This device works fine. My only complaint is that you have to depress and hold the on/off button for about 4 seconds. It should be one touch for on and off. When it is playing, the button does serve as pause/play, but I think that would rarely be used by anyone. Just make it one touch for on/off.

Overall good build quality. Audio quality sounds like Bluetooth should, no noise or static. I tested this out in the garage and the distance can actually go quite a bit more than what is listed. I was able to go about 80 or 90 feet away outside of the garage raising my phone up to keep objects from blocking it. When close to ground level where there is a lot of object blocking it, it ranges between about 25 to 40 feet. This is the second product I bought from UGREEN and I am pleased with both of them, not afraid to buy another product from them. Package comes with charging cable and 3.5mm aux cable. There is no RCA cables or wall charger included.

I have used the Auris bluMe and Logitech BT Receiver before this one. I wanted a Bluetooth receiver for a 3rd system that is in the basement, which we use for watching kids movies or while using the treadmill. The Ugreen receiver does not come with a USB charger, which is fair enough, considering the price.. But I had one on hand and used the same. After you connect your "source" (phone, tablet, laptop, etc) to the device and play music, the very first thing you notice is that, this is a low output device. What I mean is, you have to bump up the volume control to (in my case from 9 o'clock position to almost 12 o'clock position) to get the same volume level of sound as the Auris bluMe. The same is the case with Logitech BT. The highs were not as good as the Auris. The bass was not tight and rather sounded boomy. I don't care about this when I am using the treadmill. All I wanted is some music that plays in the background. This device should not be used in a high resolution system. But it gets the job done, of putting out music via BT on your system. This product is a case of what-you-pay-is-what-you-get. The Logitech BT is a much better device when it comes to resolution and sound quality. It also costs much more than the UGreen. I would rate the Auris bluMe as 9/10, Logitech BT as 4/10 and the UGreen as 3.5/10. The system consists of a pair of Pioneer SP-BS22-LR loudspeakers on Pangea Audio LS300 loudspeakers, JW Audio CryoNova speaker cables, S.M.S.L SA-98 amplifier and Signal Cable Silver Resolution (Eichmann Bullets) RCA cables.

I got this in lieu of a pricier unit. I was first really surprised with the sound quality. Very pleased. My only gripe is that there is no charger plug provided. Just a micro to usb cable. My set up is an older Sony Amp that is inside with a pair of outdoor Bose speakers for the patio. I was using an older android phone with Spotify and controlling song selections with my current phone via my wifi network but I had to get up and go inside to adjust volume levels. This solved my problem via Bluetooth and allows volume to be adjusted on my phone. Just the lack of a wall plug is my only knock. Other than that I'm thinking of getting a couple more for a simular issue around the house. For the price, I'm very pleased with it. Also to add, the range of the Bluetooth signal seems to be farther than the advertised 32 feet. With the unit just inside the house, I walked out in the yard about 45 feet or so and it never lost signal. Update :Well, worked great for a few days then stopped connecting. Tried another Bluetooth source and it won't connect to it either. Too bad.. I was really happy with the product and was optimistic about buying another one. I'll be returning this one and try another brand.