Jabra Speak 710 UC equips you with what you need to take part in conferences with up to six participants. The Link button enables you connect an additional speaker to upgrade to 12 participants. - Includes LINK 370 USB adapter (dongle) - Plug and Play - Superior sound for the best voice collaboration - 360° capture for realistic communication - Smart button for digital assistant on your smartphone (Siri, Google) We recommend: Using the Kensington lock adapter provided to protect your speaker from theft. (Lock available separately)