No connection problem. Plugged into the back of the amp to the RCA Aux. As said in other comments the syncro blue LED is too bright. I added a small pear switch (nightlight) on taking forward the transformer to cut the power supply when I did not serve me. Range found in my environment 6-8 m without problems.
I connected it a Samsung Galaxy S3 smartphone, a Samsung Galaxy Tab 10.1 and 3 a laptop Asus Rog G741 equipped with a WiFi-Bluetooth 4.0 card.
The Bluetooth connection is simple, no problem with 3 pre-listed facilities. You just cut the bluetooth on each equipment to switch to another.
At level sound quality with full quality ripped mp3 (320 kb / s), few differences with the original. But there nevertheless a very light clipping on both ends of the spectrum. This is normal, limiting the Bluetooth apt-X codec and mp3.
Listening to the radio (with tunein) on the stereo, it's just great, with excellent quality including TSF Jazz, Classical Music Radio or France. The other way radios are all compressed, even FM.
In summary,
To:
-good value for money
-easy to implement
-Good sound quality
Against:
-Diode Blue too showy and lack of on / off button
