Ergonomic Left Handed Keyboard for Business/Accounting - 8 Multimedia Hotkeys - Eliminates RSI and Carpal Tunnel - Patented Natural_A Keycaps to Reduce Back and Shoulder Strain to Improve Posture Exclusive left-handed numeric keypad, patented natural_A shape key structure, laser inscribed keys. Compatible with Windows XP, 7, 8, 10 & Mac OS X. Available in ps/2+ USB Software that was innovatively designed to optimize all its keyboard's performances including multi-functional hot-keys managing tool Keyboard: 18.72L x 8.1W x 0.98H in. Patented &#039;A&#039; layout for equal distribution of workload - eliminates pain in neck and shoulders. Laser inscribed keys increase durability 8 Convenient Hot Keys 103 Keys USB Interface