ACK-595 is especially deSigned for Windows. It has 88/89 keys with embedded numeric keypad and 12 dedicated function keys. Device type: Keyboard. Dimensions: 11.3 W x 5.5 D x 1.1 H. Connectivity technology: Wired PS/2. Form factor: External. Connectivity technology: Wired. Interface: PS/2. Connections: 1 x Keyboard generic 6 pin mini-DIN (PS/2 style). Min operating temperature: 32 F. Max operating temperature: 131 F. Humidity range operating: 10 95%.