Snom C520 3-SIP gigabit  Poe VoIP Conference Phone  with with 2 detachable Microphone

Whether you run a small business from a home office, or collaborate in a large conference room, the Snom C520 SIP conference phone uses Bluetooth® and DECT 6.0 technology for frustration-free calls and meetings. The system serves as a personal workspace device, while replacing the need for a separate deskset and conference phone. Connect your cell phone, or pair a Bluetooth or DECT headset with the speakerphone for hands-free and/or private calls. The C520 can go beyond the office, and work in any-size conference room. The system—with one fixed built-in mic and two wireless mics can support nine or more active participants in a small conference room. Or, it can easily scale up with the accessory C52-SP DECT expansion speakerphone to handle 27 or more active participants. Now, you can clearly hear, and spread out and speak without shouting.

Full-duplex speakerphone in base
Callers can speak and be heard at the same time, just as they would in a face-to-face meeting.
Flexibility
With support for up to three SIP lines/accounts, you can manage multiple calls with advanced call handling features.
Wireless expansion
Collaborating in a large conference room? Pair up to three C52-SP DECT Expansion Speakerphones to increase the volume and microphone pickup for 27 or more active participants.
Intuitive design
You're in business with a user-friendly interface, large backlit display, three soft keys and navigational pad.
Bluetooth connectivity for headset and mobile devices
Bluetooth enables hands-free calls and connectivity to headsets and mobile devices. Make and receive cellular calls on the speakerphone, or pair your favorite headset to the speakerphone for a private conversation
HD voice quality
With G.722 wideband codec support for HD audio, calls have never sounded so rich and life-like.
DECT 6.0 wireless microphones
Portable, wireless microphones allow everyone to collaborate beyond the conference table.
Up to 12 hours of talk time per wireless microphone
With 12 hours of talk time for each microphone, you have plenty of room to keep the meeting going on one charge
Up to 70 hours of standby time per wireless microphone
With up to 70 hours of standby time for each microphone, there's no need to worry about losing a charge midmeeting.
Built-in wireless microphone charging bays in base
Magnetic charging bays in the base keep the microphones together and ready for the next call.
Operable in small, medium and large rooms
With a base speakerphone, one fixed and two wireless microphones, ErisStation is a flexible solution for any size conference room.
Automatic gain control
Digital mixing, Volume Control: 10 levels