Contoured Ergonomic Keyboard with Built-In Touchpad (USB) - Adesso Inc ::: Your Input Device Specialist :::
Amazon.com: Contour Design Balance Keyboard Wired - Wired Ergonomic Keyboard Compatible with Mac & PC Computers - Computer Keyboard for Enhanced Comfort & Reduced Reach - (15.4 x 4.7 x 0.9 Inch) : Electronics
Amazon.com: Contour Design Ultimate Workstation Plus Wired - Includes RollerMouse Plus & Balance Keyboard - Wired Ergonomic Keyboard and Mouse Combo - Compatible with Mac & PC Computers : Electronics
Balance Keyboard by Contour Design Inc. : ErgoCanada - Detailed Specification Page