Plantronics M214i 3-in-1 VoIP Headset

M214i 3-in-1 VoIP Headset delivers crystal clear sound when using Internet/VoIP, cordless or mobile phones (2.5mm). Simple Plug and Play. No drivers needed. Noise-canceling microphone filters out unwanted background sounds. Single-ear design for easy side conversations and listening to your surroundings while working. Easily adjust volume and mute with one-touch controls. Ideal for a noisy home environment. Headset offers comfortable, stable, over-the-head fit for all-day wear. USB adapter included for Internet phones. Voice over Internet Protocol (VoIP) is a technology that allows you to make voice calls using a broadband Internet connection instead of a regular (or analog) phone line.