Hi-Fi prowess with over 30 hours of play time Monitor Bluetooth combines Hi-FI prowess and Bluetooth aptX technology to give 30+ hours of exceptional audio quality on a single charge. Monitor Bluetooth's ergonomic over-ear construction delivers superior noise isolation without the bulk, staying light on your ears through hours of listening. The multidirectional knob lets you control your music and phone functionality with ease. Wirelessly answer, reject or end a call with the control knob. Two built in passive noise reduction microphones allow conversations and to record voice memos via a device. Black vinyl, brass accents and the embossed Marshall script give Monitor Bluetooth that iconic look, while the foldable design, heavy-duty cast metal hinges and a canvas carrying case provide extra protection.