This is the Bluetooth version of the Kinesis Freestyle2 for MAC keyboard. The Kinesis Freestyle2 split keyboard is a breakthrough in modular ergonomic design. This second generation of the proven Freestyle series has been improved with input from ergonomists and health professionals. The Freestyle2 adapts to the specific needs of each user, minimizing awkward postures, while providing a stylish accent to any workstation. Featuring simple, sturdy adjustment mechanisms the Freestyle is intuitive to configure and use. It is perfect for individuals who require more separation and options than provided by other ergonomic keyboards. The modules can be separated a full 9 inches, allowing any user to position the keyboard in a neutral position. Notable improvements in the Freestyle2 when compared to the Freestyle Solo include: 1) A dramatically thinner profile greatly improving the portability of the keyboard 2) An additional inch of potential separation 3) Noticeably quieter keying action making the Freestyle2 one of the quietest keyboards on the market today 4) Addition of volume controls and calculator key. Primary Information Input Device Type: Keyboard Connectivity Technology: Wireless Interface Type: Bluetooth Weight: 1.9 lbs (885 grams) Features: Modules Completely Separate to 9", Driverless Hot Keys, Embedded 10-key, portable ultra-thin design. Dimensions&Miscellaneous Width: 15.37 Inch Depth: 7.25 Inch Height: 0.87 Inch