LK-211 Standard Keyboard with USB+PS/2 Ports Key numbers: 107/108/109/110/112 Language: any layout Switch travel distance: 4.5mm Peak force: 55g Operating temperature: 0 - 50 deg. C Operating humidity: 20% - 90% RH Key switch life: 10,000,000 times Power consumption: 0.5W Power supply: +5V Available port: PS/2, USB, U+P combo