PS/2 SERIAL PORT KEYBOARD - Classic design, equivalent to the classic IBM Model (e.g. IBM AT/PS2 Keyboard). It meets IBM PS/2 specifications, made to comply with classic style PC, computers and other devices. ERGO COMFORT SUPPORT - This is a sturdy keyboard with integrated curved membrane keys and adjustable legs to allow you to adjust the keyboard for your typing needs. Great tactile key response, no sticking, slugging or binding comes with strategic spacing to make typing feel more natural. DURABLE LASER PRINTING - The membrane keys exceed 10 million keystrokes functional life without wear or tear. Stabilized wide keys reduce the time needed for your keystrokes to be registered and improves efficiency and precision during use. STANDARD US LAYOUT - This is a full size keyboard with built-in numeric keypad and 3 LED indicators allow for great accessibility to your device. BUILT LIKE A TANK - This simple but durable keyboard with laser printing is made to last a long time.