Top function, sound is so I use this Bluetooth headset with a HTC Desire Z, under a hearing protector, I wear while working. The control of all functions to work properly, although I am different "dealer" have confirmed that you can not. Fortunately, the headset has a built-radio because at louder ambient noises the music transfer from cell phone is too quiet. The sound has not hit me from the base, but is still ok. Unfortunately, even the smallest ear cushions are a bit too big for my ear canals, so that the handset to slip out and. At this price, the headset is all but a recommendation, at least for my purpose.