BMW SAT NAV MOUNT...

[Poshtosser]

Can`t remember the differences too well but I think main one is bike to bike coms and distance, and better battery life on the 10. I have used the 5 for full day riding and bat life is more than enough for that.

More info http://www.webbikeworld.com/motorcycle-intercoms/sena-smh-5/

Again thank you. The link was useful and strongly recommends the 5 but the next search brought up a Youtube comparison which strongly recommended the 10. I suppose this just supports the theory that opinions are like arseholes. Everyone's got one.