Dell Premier Collaboration KB900 Keyboard - Wireless Connectivity - USB Interface - English (US) - QWERTY Layout - Graphite - Scissors Keyswitch - Bluetooth/RF - 5.1 - 2.40 GHz - Multimedia, Calculator, Play/Pause, Screen Lock, Mute, Screen Sharing, Video On/Off, Screen Snipping, Task, Desktop, Search Hot Key(s) - PC, Mac OS