Exceptionally lightweight over-the-ear style. Three-point design provides support behind on top of and in the ear for unsurpassed stability and all-day comfort. Four user-selectable earbuds for the perfect custom fit. Discreet lightweight design. Voice tube model weighs only 0.42 ounces. Noise-canceling model weighs 1 ounce. Supports Clearline audio technology. Ensures precise listening level sophisticated hearing protection and superior audio performance when used with Plantronics amplifiers. Quick Disconnect feature lets you walk away from your phone while still wearing your headset. A 10 foot coil cord with adjustable clothing clip allows additional freedom of movement. Can be worn on either ear. Available with Voice Tube or noise-canceling microphone: Voice tube Plantronics trademark design is light weight unobtrusive and delivers great sound quality in all but the noisiest environments. Noise-canceling microphone Ideal for noisy environments (over 65 dB). Requires Plantronics amplifier USB-to-headset adapter or direct connect cable to connect to phone.