what version of bluetooth is needed for stereo headphones
The most common Bluetooth profile in cell phones is the Headset profile which supports the use of standard mono headsets for making calls. Here's a list of the more frequently used Bluetooth profiles in cell phones, as described by the Bluetooth SIG: Advanced Audio Distribution Profile (A2DP) Also widely known as the stereo Bluetooth headset profile, A2DP allows for a dual-channel audio stream through a stereo headset.