Review on Office Monaural Headset with Microphone RJ9 Plug for Cisco IP Phones 794X, 796X, 797X, 69XX Series, 8811, 8841, 8851, 8861, 8941, 8945, 8961, 9951, 9971, etc. - Enhanced Volume and Mute Control by Curby Alston

I have a polished CIsco phone at work and can buy it cheaply as no headsets are provided. I can't say they cancel out noise at all, you can still hear conversations around you, but they work and save you the trouble of holding the phone to your ear during meetings. The mic seems to work well, the earbuds are a bit small and swivel a bit for comfort. The plug is right in the phone and the phone adjusts the volume, there is static when not on a call but I only wear them to meetings so I don't have to deal with that but if you leave them on all the time maybe have to you learn to switch off.