Kinesis Maxim USB-PS/2 Combo Keyboard, native USB with PS/2 adapter More flexible than "natural-style" keyboards; no adaptation required. Select any opening between 0 and 30 degrees. Splaying the keyboard modules positions your wrist and hand in a neutral posture greatly reducing ulnar deviation. Compatible with virtually any PC system with a USB or PS/2 port. Dimensions: 15.1"W x 1"H x 6.5"D without wrist rest