Just acquired a Scala FM headset courtesy of Yonkyo 
As I'd heard the bluetooth music streaming from the Zumo was crap quality mono sound
To get round this I got a Belkin FM transmitter for £2 off Ebay, plugged it into the music jack on the Zumo mount and tuned the Scala in to it and the sound is much better and in stereo
When I eventually upgrade to a A2DP headset it'll just be a case of swopping the FM transmitter for a stereo bluetooth one
As I'd heard the bluetooth music streaming from the Zumo was crap quality mono sound
To get round this I got a Belkin FM transmitter for £2 off Ebay, plugged it into the music jack on the Zumo mount and tuned the Scala in to it and the sound is much better and in stereo

When I eventually upgrade to a A2DP headset it'll just be a case of swopping the FM transmitter for a stereo bluetooth one