English, Esn, Ara, and Rus keyboard layout 2. There are 104/105 keys. 3. There are twelve Fn shortcut keys. 4. Windows with a Cyrillic alphabet layout 5. Keys contact: tactile feedback membrane 6. More than 10,000,000,000 strokes and error-free running time 7. Multimedia 8. Technology for communication: wired 9. USB 10 interface. OS compatibility: MAC OS 11 and Windows XP/Vista/7/8/10. Measurements: 443 x 140 x 42 mm 12. Mass: 876 ±5 g