RFAdapter 3.5mm Mono to Stereo Adapter, 3 Pack - Mono Male to TRS Stereo Female Jack for Radio, Headphone

Works perfectly. It converts a mono output to stereo.

I originally rated it low because I thought it messed up the audio but for other people having similar problems make sure you don’t make the same mistake I did. Do NOT use a three ringed aux cord / microphone aux cord cause it will mess with the audio. The size is still inconvenient but other than that it works just how you would want, again just don’t plug it into anything other than a stereo aux cord.

Received in brand new perfect condition. Great product that works!

Use to plug into a mono radio to use 2 speakers like a stereo set up.

I lost the hearing in one ear due to a childhood disease. I have tried using a Stereo to Mono adapter separately but it only plays one channel into stereo headphones. Using this adapter (mono to stereo) alone should not be used on stereo outputs as another commenter mentioned. Using a 3.5mm stereo to mono adapter (Amazon link below) FIRST, then this (3.5mm mono to stereo adapter) between my mp3 player and stereo headphones lets me hear both channels of music as it combines the left and right channels. If you are deaf in the right ear, it would work as well. The Stereo to Mono plug ... https://www.amazon.com/3-5mm-Stereo-Adapter-Plated-Female/dp/B0919C5D93/ref=rvi_sccl_1/147-7222868-2528614?pd_rd_w=tqWos&content-id=amzn1.sym.f5690a4d-f2bb-45d9-9d1b-736fee412437&pf_rd_p=f5690a4d-f2bb-45d9-9d1b-736fee412437&pf_rd_r=DR0VE4K39QZFSS9VK95Q&pd_rd_wg=f94W0&pd_rd_r=3365bbb5-daa0-41b1-af79-4ae60a8cffe6&pd_rd_i=B0919C5D93&psc=1 ...first combines the two channels then, the Mono to Stereo plug (this one) sends both channels equally to left and right of my stereo headphones. I taped the two adapters together. Audiophiles will cringe since the outputs and levels are not designed to be combined but, for a person with only ability in one ear, we get to hear all of the music and voice. Hope this helps. Additional edit due to an important point mentioned here... This works with my simple mp3 player which has a three conductor plug Tip (L)-ring-sleeve (R)-sleeve(G). I would not recommend trying this with other plugs that may have a microphone or balanced stereo outputs. These would have 4 or more smaller conductor rings on the plug (say a phone. etc.) and require (as mentioned by another) a more a complicated way to convert the output however, for this application, I have not yet found another way of doing this. I might also mention for those using Windows 10 and 11 (I'm not sure about IOS) in the Ease of Access/Audio setting you can set audio to mono thus, all of this is not required.

If you have a pair of stereo headphones but want to use them to listen to mono (e.g., dictation), these do the trick.

These are junk. Jacks plugged into the female end don't fit tightly and the outer caps come off too easily.

Exactly as advertised, promptly delivered

Works good but definitely overpriced

En términos generales, buena funcionalidad, y buena calidad en sus materiales