The Jabra Evolve 40 3.5mm/USB-C MS Duo is a Binaural headset for PC, Smartphone and Tablet with excellent audio and a comfortable design. Enjoy high quality audio and music straight out of the box, no set up required, just plug in and you're ready to go. Audio features include Wideband audio, Noise Cancelling microphone and BLF light to acts as a DND when on a call. Control the volume of music, answer, end and mute calls with the handy in-line control unit. With a lightweight design, soft leatherette ear cushion and adjustable padded headband, the Evolve 40 Mono is ideal of all day use. Features: Wireless Bluetooth Headset Crystal Clear Calls 6399-823-189 Specifications: Dimensions: H:6.0 x W:16.0 x D:20.0 cm Colour: Black Guarantee:2 years Material: Plastic Model Number: 100007181