The Plantronics Voyager 815 Bluetooth is a lightweight, comfortable headset offering outstanding performance for mobile professionals. AudioIQ technology digitally enhances sound to improve call quality at both ends of the conversation. Sidetone Audio gives you feedback so that you know the exact quality of what is being transmitted. Multipoint technology enables you to switch seamlessly between calls on two Bluetooth devices. The sliding boom improves your voice quality and is an alternative way to answer and end calls. Innovative earbuds seal out external noise so that you can enjoy crystal clear conversations even in noisy environments such as an airport or train station.