The Sandberg Wireless USB Headset makes the irritating cord hanging from one headphone on traditional headsets redundant. It gives you ultimate freedom of movement, enabling you to listen and speak wirelessly in a radius of up to 10 metres from your computer. Installation and charging batteries are both easy and quick. Simply insert the small USB transmitter into the computer, and the devices are instantly connected. Charging can be done either via USB or in a power point using the adapter provided. The headset is equipped with 40 mm queen-size speaker units to give you brilliant sound. The headset can also be used as a wireless receiver when connected to external speakers or stereo systems using the audio cable included. English user guide.