OneLink connectorHeadphone/microphone combo jackKensington security slotLenovo Ethernet extension connector | Dock/ Headphone/microphone combo jackSim Card Slot | USB Type-Cسیم کارت خورقلم لمسیHeadphone/microphone combo jackButtons for volume up and downKeyboard base with TouchPad | Headphone/microphone combo jackUSB Type-CSecurity lock |