HiLetgo 3pcs M28 Wireless Bluetooth MP3 Audio Receiver Board BLT 4.2 mp3 Lossless decoder Bluetooth 4.2 Audio Receiver Board Wireless Stereo Sound...

I was searching for a BT board to put inside my DIY headphone and bought this one due to a person in the question section said it does not have voice announcement. It actually does play the annoying announcement. It also has lot of noise when playing the music. This hissing noise still stays on for about a second after you pause your music so definitely something with the firmware.

These worked great to add Bluetooth to my work and personal vehicles for music. They can't take calls as there is no microphone but for the price I can do without. The main issue with these is that you have to reconnect manually just about every time you use them but you get used to it. For the price these are fantastic!

Good sound, easy reconnect, too bad cant change ID, will be perfect if it does.

Sound is very clear. The problem is that not worked for phone calls, only for media.

No buttons, no built in amplifier, lacks all the useless features that other more expensive adapters have, has 3.5 jack and usb for power, very simple module, exactly what I needed. Used it in my car with Nexus 7 2013 in dash. 3.5mm jack in Nexus 7 is very noisy when nothing is playing. This thing fixed it. Pros - no buttons, pair any time. - 3.5mm output jack, many other adapters don't even have one. - no built in amplifier, doesn't require big power supply. Can be powered by battery. - clean sound, better highs and lows than tablets' 3.5mm jack, who would have thunk. - 3 for the price of one Cons - only one device can be connected at the same time, but that's expected.