The PC 21 headset from Sennheiser is an ideal choice for Internet communication. The headset has a single earpiece with a foam cushion, allowing you to maintain awareness of your surroundings. The noise-cancelling boom mic filters out background noise and is adjustable for finding the perfect position. The dual 3.5mm plugs connect to your computer's microphone and headphone jacks for plug-and-play compatibility. Whether playing computer games or conducting business chats over VoIP, the PC 21 is a terrific option.