[shaggylive]

despite some early fights with the volume buttons, my s9's have held up great! 2yrs and still going strong. although I will say the mic is not the best in noisy environments, but atleast you can hear the phone ring and quickly send the audio back to the phone. (also standard 5pin mini-usb charger)

I had the voyager 510 and it was the best at the time for noise cancellation. it's downfall was that the wires for the mic are not designed for more than ~500 deg rotation. lol, mine broke and ended up breaking the casing trying to 'fix'

btw, plantronics was the first in space.