Longer telephone calls or conference calls can be conveniently carried out with headsets. They are individually adjustable, comfortable to wear, and in permanent use, especially in service centres or medical practices, where they perform enormous amounts of work. Hands are free and not occupied in holding a receiver. Wired earphones with a microphone can be plugged into almost any device with appropriate inputs and, thanks to generous cable lengths, offer a long slack. Volume controls on the cord also add to the comfort. Headsets with wireless Bluetooth technology expand the radius, and facilitate execution of accompanying activities. A relaxed musical enjoyment is also possible. If somebody calls it is quickly possible to switch. Webcam Headset kits are immediately ready for video calling.