The SupraPlus noise canceling headset reduces that background noise that your callers hear and has enhanced audio for better listening accuracy. This is a single sided headset and it supports USB to headset adapters. That means you can use it with VoiP phones.
Two year warranty. The SupraPlus has a quick disconnect cable to be used with the Plantronics M22 Vista amplifier. If you want to use the headset with the HC-UA55 amplifier, then you'll want HC-N251NKIT that includes the RJ9 adapter cable.