... audio cable with Mic, insert it to the headphone and computer, then you can chat. (Optional)Specification:1. System : VHF/RF2 ... cable, Touch , Housing, Battery, Charger, Earphone, Bluetooth handset, protector case, Memory card, USB cable, speaker, MP3, Unlock and so on.If ... hours, thank you! KST-9084 Wireless bluetooth headphones with Mic for laptop/computer/MP3/MP4