Security Lock slotHeadphone/microphone combo jackUSB Type-CSD card reader | SmartCard readerHeadphone/microphone combo jackKensington security slotUSB Type-C Thunderbolt | Microphone/Headphone / DockUSB Type-C ThunderboltSecurity lock | Dock/ Headphone/microphone combo jackSim Card SlotUSB Type-C Thunderbolt |