Is that the case though for the "10U" as I looked at that one but the battery pack wouldn't appear to fit my Shark helmet? Sena have teamed up with Shark to produce Shark's own Sena unit but it's not got the range of the 10S or 10U units hence I haven't bothered with the Shark one.The Sena “Arai” is so called because it’s for standard helmets rather than either flip (Schuberth etc) or the Shoie specifi one.
They will fit any helmet as it’s ear bud and a wired mic.
man issue with Sena can be that a low battery means stopping and they aren’t 100% waterproof unlike Cardo which is and can be charged and used at the same time.
Cardo also have removable speakers so can be used with in-ear with a 3.5mm jack.
I read this from Sena's website:
Fitting other helmets besides what is specified on the box.
Currently the Sena 10U System is available in 4 different models:
Shoei GT-Air, Neotec and J-Cruise
Arai full-face helmets
With more to come in the future.
These available versions of the 10U will only fit in these specific helmets as they were designed specifically for them.