Absolutely terrible product. Latency is huge (nearly a second delay) so it is unable to be used for anything that requires very quick feedback. I purchased this to use with my electric piano for my wireless headphones. Unfortunately it was over a month before I needed them (I should have tried this day 1). So I connect it and the delay is so bad it is completely and utterly useless. Tried the same for my computer and audio is so far out of sync with video that it cannot be used.
I really really really wish I tried this out the day I got it. I would have sent it back immediately and got my money back and invested in a longer 3.5mm audio cable instead.
Hope this helps someone thinking about purchasing to avoid the same mistake I made.