Sennheiser has launched its VMX-100 range of Bluetooth headsets, featuring intelligent sound which should improve the quality of mobile phone conversations. Its VoiceMax dual microphone technology and intelligent, adaptive filtering of background noise strives to give unprecedented call quality. It features Activegard to prevent hearing damage, and is ergonomically designed for comfort. The headset weighs just 15g, fits the contour of the ear, and has a unique 3D ball joint which enables adjustment of the microphone boom. It also has a two-way speaker allowing to be worn in either ear.