Dock/ Headphone/microphone combo jackSim Card SlotUSB Type-C Thunderbolt | Microphone/Headphone / DockUSB Type-C ThunderboltSecurity lock | SD card readerHeadphone/microphone combo jackKensington security slotUSB Type-C Thunderbolt | SmartCard readerHeadphone/microphone combo jackKensington security slotUSB Type-C Thunderbolt |