We developed the Jabra BIZ 2400 Monaural with one goal in mind: to be the world's best corded contact center headset, delivering both best in class noise cancellation and acoustic shock protection, as well as the industry's only unbreakable 360 swiveling boom and Kevlar-reinforced cord. Connect to your PC, mobile or desk phone with QD (Quick Disconnect) connect cables. Flexible 3-in-1 design allows for headband, neckband or ear hook wearing style. Also features a Noise Canceling Microphone reduces unwanted background noise and the noise-canceling microphones reduce unwanted background noise and are ideal in crowded and noisy, open office environments. (standard microphone sensitivity) to eliminate ambient noise.