Lightweight convenient over-the-ear design provides easy on/off flexibility. Ergonomically sculpted shape fits comfortably behind either ear. Adjustable speaker rests lightly against the ear. Supports SoundGuard Plus and Call Clarity technologies for superior sound when used with Plantronics amplifiers. Quick Disconnect lets you walk away from your phone while still wearing your headset. 10-foot coil cord and adjustable clothing clip for freedom of movement. Noise-canceling For clear conversations in noisy environments (over 65dB).