GTMax Black/Blue Microphone Headset + Cellphone/Smartphone Headset to PC Adapter + Mini Brush for Computer, PC, Laptops The Microphone Headset Fully Compatible with: VoIP Skype / MSN / Yahoo / ICQ / AOL or internet calling. This Hands Free overhead VOIP / Skype headset is great for internet phone, conference calls, video games. Smartphone Headset to PC Adapter: Use a 3.5mm iPhone/Smartphone Headset With Your PC, Converts 3.5mm Plug to Dual Mic/Audio 3.5mm, for Skype/VOIP Use free internet phone programs like Skype, Messengers, Yahoo Messenger, and Google Voice. Note: Mac users, many Mac computers need an amplified microphone source (such as an iMic), you will need both this adapter and PC Headset to USB adapter.