- Has an excellent noise cancelling microphone with additional audio processing, making your voice very clear at the far end.- Has best of breed automatic equalisation to suit both telephony and music/commentary- Plantronics first rate audio shock and sound exposure protection to protect your hearing. G616 compliant and compliant with US and EU health and safety at work regulations.- It is important to download the Plantronics hub software and configure the headset to enable the safety features, as some of the safety and compliance features and not enabled by default; you must enable these with the Plantronics Hub software - there is also a pro version of the hub software that allows IT organisations to centrally manage headsets.- An excellent choice for those who use telephony for up to 4 hours a day.- Do not use the headset directly plugged into the headphones socket of your computer because some of the safety features are a function of the USB interface.- I find them very comfortable indeed- Not really suitable for contact centres as the ear cushions and not easily replaceable Plantronics have other models which are more suitable for this environment