at first sight the apparatus is small and fragil, but when using it give it to you account that adapts very good to the ear, the sound is good, although per moments you feel something of noise, mainly if it is that there are obstaculos between Headset and I cell phone, is easy to connect to telephone, I have a Sony Ericsson P910i and in single I delay seconds to tie them, the time of baterie is very good, it use case all the day and 12 days have lasted me.as negative point I must say that sometimes one does not adjust very either to the ear, mainly when you lead is a problem, is necessary to move it a little to fit it or, because but it can fall.with respect to micro, it is listened to well, although sometimes the places with much noise one must speak hard so that they listen to it. look modern and showy, all the people always turn around to watch it when it use.It is a good purchase...