This is probably not possible but I thought I'd ask. The idea is to pair a Bluetooth Music Gateway
with a Jabra SP700 Bluetooth Car Kit
or other car kit/speakerphone. This is for recording purposes to capture the audio via a PC. I'm sure there are better ways but under the circumstances the system has to be mobile, as in not being stationary rather than phones, and self-powered as there is none where the audio input, car kit/speakerphone, would be.