The Konftel 300 fits everything from small meeting rooms to large auditoriums. It includes the option to connect a pair of expansion microphones to increase the pickup range and cover up to 20 people in a room. You can also connect a wireless headset if you're lecturing. If you use the PA box to connect to a PA system, there is no limit to the size of the meeting. A USB port makes the Konftel 300 ready for all the apps and services we use to communicate and collaborate via computers – such as Skype for Business, Cisco Spark, Avaya Zang, Unify Circuit and Google Hangouts. Don't compromise on audio quality when your teamwork goes "live" in an online meeting. Use the line selector to switch easily between connections (analog, USB and mobile phone via cable), or connect calls. Other popular features include recording onto an SD memory card, and a conference guide that will take you through the steps to set up a multi-party call and create call groups.