Serial Port / Headphone/microphone combo jack | Card Reader: SD, 1 SmartCard | Dock/ Headphone/microphone combo jackSim Card SlotUSB Type-C Thunderbolt | Docking StationHeadphone/microphone combo jackButtons for volume up and downSim Card Slot | Headphone/microphone combo jackKensington security slotUSB Type-C ThunderboltSD card reader |