Sennheiser PC 7 USBNoise-cancelling microphone - the microphone filters out ambient noise. They are clearly understandable without having to be loud.Plug and play via USB - simply connect the headset to the USB port of your PC or Mac and you can make calls instantly via the Internet.One ear free - ideal for families: Thanks to the one-sided version, you won't be cut off from your surroundings when talking over the Internet.Lightweight and comfortable - with the lightweight headband, you'll forget that you're wearing a headset. The affordable PC 7 USB with super simple USB plug and play function Simply plug into your computer and talk over the Internet: The low-cost PC 7 USB headset has a simple USB plug-and-play function and is ideal for the whole family. The single-sided carrying style of the PC 7 USB means that you always have one ear free when chatting. The headset is made of robust materials and is almost indestructible. With the noise-cancelling quality microphone, you can be sure that every single word is understood, regardless of the surrounding noise.