Headphone/microphone combo jackUSB Type-CSecurity lock | SmartCard readerSD card readerHeadphone/microphone combo jackKensington security slotSim Card SlotUSB Type-C Thunderbolt | Microphone/Headphone / DockUSB Type-C ThunderboltSecurity lock | Headphone/microphone combo jackKensington security slotUSB Type-C ThunderboltSmartCard reader |