Serial Port / Headphone/microphone combo jack | Card Reader: SD, 1 SmartCard | USB Type-C ThunderboltSD card readerHeadphone/microphone combo jackKensington security slot | Security lockMicrophone/Headphone / DockUSB Type-C Thunderbolt | USB Type-C ThunderboltSmartCard readerHeadphone/microphone combo jackKensington security slot |