Sena head cam

I have been using your Prism tube head cam for a couple of years now.  The only glitch I have found is that when wearing gloves, it is impossible to " feel " the unit.  Therefore it is difficult to switch on.  If the red ridge was more pronounced it would be easier to operate.  Similarly, because of the lack of feel, the tube can easily rotate in the clamp.  If the surface of the tube, and inside of the clamp were ribbed or rough,, it would be more secure.  

Otherwise very pleased with the Prism tube, and picture quality surprisingly good.