I have a couple of helmets equipped with the 10S. I used them riding up in Canada last winter...voice activated, good noise filtering, decent range. I bought the 20S this fall for a couple of additional helmets. This version has an Android/IOS app for setup/control. It can link with GPS, cellphone and audio.
They just came out with the 30S which has adaptive mesh capabilities.
Jetskier
http://www.sena.com/product-category...communication/