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