Ive purchased one of those viper blutooth helmets
ok first of all the blutooth side of it is very good even at higher speeds.
however the wind noise from this helmet is painfull and i mean painfull anything over 70mph the wind noise is almost eardrum bursting to a point where it makes you slow down because of the pain
so my advise DONT buy one.
anything over 70mph the wind noise is almost eardrum bursting to a point where it makes you slow down because of the pain 
errr your'e not supposed to excede 70mph 
