1. Expansion Bay | 2. Optional DVD-RW | 3. Power Button | 4. Optional SD 4.0 Card Slot | 5. Universal Audio Jack | 6. 2 USB 2.0 Ports (1 with PowerShare) | 7. USB 3.2 Gen 2 Type-A Port | 8. USB 3.2 Gen 2 Type-C Port | 9. Audio Line Out / Line in | 10. 2 DisplayPort 1.4 | 11. Serial Port | 12. 1 USB 3.2 Gen 2 Type-A Port and 3 USB 3.2 Gen 1 Type-A Ports | 13. 2 USB 2.0 Ports (1 with Smart Power On) | 14. Optional Expansion Card Slots | 15. Side Panel Release Latch | 16. Optional: VGA Port/ HDMI 2.0 Port/DisplayPort++ 1.4/USB 3.2 Gen 2 Type-C Port with DisplayPort Alt Mode | 17. Padlock Loop | 18. PS/2 Port for Mouse | 19. PS/2 Port for Keyboard | 20. RJ-45 | 21. Kensington Lock Slot | 22. Power Connection | 23. Optional Antenna | 24. Power Diagnostics Light