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I received and tested the module today, and it works fine! It has very little latency as it is bluetooth 4.1. I had zero problem connecting to the device. I found out a couple of minor drawbacks though. It beeps whenever I change volume on iPhone. Like most of bluetooth devices, it becomes idle when iPhone doesn't send a signal. I believe it beeps when I change volume because it stops idling as iPhone sends a signal. Bluetooth devices are meant to be mute when volume of iPhone, for example, is set to zero. However, it is still mute when my iPhone's volume is set one step above zero, which means that I lost one minimum step of volume. I could hear small and constant noise which is not too bad but perceptible. I don't know where it is coming from, but there it is, while my other device is dead quiet. I happily received the package today, but I was a bit frightened because it was packed only with a single sheet of bubble wrap in a plastic wrap. As I know, it's traveling from the other side of the globe, and fortunately it made it. But wouldn't it be safer if you protect it at least with something like cigarette pack? Just out of concern. So, questions here: Is there a way that I can get rid of beep sound using COM/PP or Volume pins by any chance? How can I use COM/PP and Volume pins? Any idea that I can get rid of the noise? Generally I am satisfied with the product. Thank you!

I was trying to figure out if what frequency this uses? I have a set of IR headphones for the car entertainment system that my kids like but wanted to adapt these headphones to be used with Cell phone or MP3 player. Basically want to use the transmitter to send audio directly to my IR headphones. It has been a struggle to get my kids to wear headphones. My headphones use these IR Frequency: 2.3mHz (Left) , 2.8mHz (Right) I have been looking for an inexpensive solution and this looks promising but cannot figure out what frequency this kit uses for modulation and if it might be able to be changed?

¿Is it possible to control this wireless module from C# instead the phone app? Thanks

Can you please provide the link to documentation? I need the pinout for this board. Also I would like to enquire one more thing - Is there a version of this board that comes assembled? Thanks

Awesome item, works great with my audio device. So far this is great and works well as advertised.

В интернете пишут что нельзя подавать больше 24в.Я подал 29 в. И все прекрасно работает. Я немного перебрал с мощностью и звук очень мощный и сильно усилитель не переодевается.Убавить мощность помощью убавления питания.

Удивительно отличный усилитель качество предусиления великолепно .Всем советую данный усилитель.А также при купить вентилятор для охлаждения.

Для этой цены хороший малошумящий усилитель даже не к чему признаться. Но моё мнение необходим вентилятор хотя не сильно греется.

Усилитель неплохой с хорошим демпированием ,,если питать 32-34в. То обязательно сменила конденсаторы.У меня один взорвался и я сразу сменил. После этого все стало прекрасно работать на 36в.