Here takes Mac as an example.
Model Name: MacBook Air
System Version: OS X 10.9.3 (13D65)
Bluetooth Receiver– Roxa
Step 1 Turn on Bluetooth of Mac.
Step 2 Get the receiver into pairing mode.
Plug Roxa into AC socket, connect Roxa to home stereo system via the audio cable, wait for 7-10s until LED blinks blue and red alternately.
Step 3 Open Bluetooth preferences of Mac and it will search Bluetooth devices automatically.
Step 4 Select the receiver from the list and pair.
Step 5 Once done, you can stream music and any other audio from Mac.