Serial Port / Headphone/microphone combo jack | Card Reader: SD, 1 SmartCard | | Kensington security slotUSB Type-C ThunderboltSD card readerHeadphone/microphone combo jack | Buttons for volume up and downKeyboard base with TouchPadUSB Type-Cقلم لمسیشارژر اورجینال تایپ سیHeadphone/microphone combo jack |