Dell D31M Owner's Manual page 9

1. Re-tasking line-out/line-in audio port
2. Three DisplayPort 1.4a ports (HBR2)
NOTE: Maximum resolution up to 4096 x 2304 @60Hz
3. Three USB 3.2 Gen 1 (5 Gbps) ports
4. One USB 3.2 Gen 2 (10 Gbps) port
5. Two USB 2.0 (480 Mbps) ports with Smart Power On
6. Four expansion card slots
7. Power cord connector port
8. Power supply diagnostic light
9. Security-cable slot (for Kensington locks)
10. RJ45 Ethernet port (10/100/1000 Mbps)
11. One video port (HDMI 2.1/Displayport 1.4a (HBR3)/VGA/USB Type-C with DisplayPort Alt mode) (optional)
NOTE: Maximum resolution
● HDMI 2.1: up to 4096 x 2160 @60Hz
● DisplayPort 1.4a (HBR3): up to 5120 x 3200 @60Hz
● VGA: up to 1920 x 1200 @60Hz
● USB Type-C with DisplayPort Alt mode: up to 5120 x 3200 @60Hz
12. Padlock ring
13. Serial port (optional)
14. Release latch
15. Service tag label
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