Sena RC4 4-Button Handlebar Remote for Bluetooth Intercoms

Works - but at a price. Makes the more or less useless helmet mounted controls redundant, and thus the whole thing actually usable, but at a price of almost the same as the actual unit. No idea how that can be so expensive, except that it can be because the thing is almost useless without it. Long learning curve for the button coding - not intuitive, and no clues on the thing itself aside from + and - for volume. A 'phone button would be nice.

I have this to use with a Schuberth C4pro helmet Sena system and it works fine, the only issue I find annoying is I use my bike sometimes when it is dark and you have to feel for the unit and it would be so much better if it had a small location light on the unit. The increased power consumption may take a few weeks of battery life from it but as most of us only use a bike for 5 or 6 months of the year it would be fine. So works fine but with a niggle that you will find annoying.