Hands free. Improve your productivity. File, use e-mail, take notes while on the phone. Keep your hands free to multitask. -Noise-canceling microphone delivers crystal clear voice quality and eliminates annoying background noise. Enjoy the whole conversation. -Call Clarity technology filters phone line and room noise for clearer calls. -Firefly in-use indicator light ends unintended interruptions. The unique boom mounted flashing red light lets others know when you're on the phone. -Two-in-one convertible headset delivers all-day comfort with a choice of wearing styles: over the head for stability or over the ear for easy-on, easy-off convenience. -Easy installation. Connects to single- or multi-line phones.