Product Features OmniBook 300, 425, and 430 Figure 1 - OmniBook 300, 425, and 430 Features 1. Latch 11. AC adapter socket 2. Display 12. Serial port connector 3. Keyboard 13. Parallel port connector 4. Card slot A 14. Infrared port 5. Card-eject levers 15. System slots (C and D) 6. On/Off key 16. Memory-expansion slot 7. Mouse 17. Modem port 8. Mouse-eject button 18. Battery compartment 9. Display contrast buttons 19. Security ring 10. Speaker 20. Reset button 2