Connection: RJ9 Microphone voice can be adjustable with excellent acoustics Stainless steel arm, can be bent, not easily broken Suitable to wear and free expansion Considerate design, supper light Handset can be adjusted 330 degree; you can find most suitable position to wear International standards for hearing protection (Less than 118db) Hands free Professional microphone, more stable and durable Operating systems compatibility: Windows/MAC/Linux Software compatibility: Skype, Zoom, Microsoft Teams and other video conferencing software