GD AX Jawbone Bluetooth Headset Setting new standards for mobile voice clarity and personal style the new Jawbone Bluetooth headset by Aliph represents a complete departure from the gadgetry of the mobile headset industry Originally developed for military use in extreme environments Jawbone features Noise Assassin proprietary technology that eliminates background noise from mobile phone conversations Jawbone is the only Bluetooth headset with a Voice Activity Sensor VAS that actually feels your speech, which helps Jawbone distinguish your voice from background noise.