Brand: Yealink Color: CP900 + Bluetooth USB Dongle Features: FULL-DUPLEX SPEAKERPHONE: What?s the Difference Between Half Duplex and Full Duplex ? a full duplex speakerphone setup allows multiple users to communicate simultaneously, a half duplex system only allows one party to speak at any given time. Just like a walkie-talkie. Yealink CP700 CP900 support built-in full-duplex microphone . so calls sound their best on both ends compare with half duplex speakerphone of another brand in the market . SIMPLE SETUP STABLE CONNECTION---YEALINK conference speakerphone could be connected via USB, Bluetooth, dongle without any extra IT required or drivers. Not only connect YEALINK conference speaker in Windows, macOS, plugging USB, but also smartphone, iPad, Samsung S7+ tablet work well by Bluetooth. YEALINK speaker and microphone for computer also have been Certified by Zoom, Microsoft Teams, whatsapp, Skype, etc IDEAL SOLUTION OF NOISE CANCELING---Yealink Bluetooth speakerphone could eliminate background noise whether working in a shared or public workspace or office. Common noise at work such as air conditioning, mouse or keyboard click, desk and chair friction sound could be reduced efficiently with speaker phone so that the far-end attendees can enjoy the best communication. This mode is optional in YEALINK computer speakers with microphone to meet your different demands. PORTABLE CONVENIENT---YEALINK conference speakerphone just weight 0.7 lb, so that you can carry it to anywhere as you wish. This speakerphone work with a 2450mAh battery. So it could be continuously working for 12H Voice communication, 450 days Standby times CONTACT US WHEN ANY QUESTION---30 days money back, 60 days free return, life time warranty. This Package including 1 Pc CP900 speakerphone, 1 Pc collecting zipper bag,1 Pc user manual, 1 USB Dongle?Dongle at the zip case button.? Listing and template services provided by inkFrog