Plantronics .Audio 50 *** DISCONTINUED *** Excellent for Internet chat, telephony, speech recognition and applications with voice command-and-control capabilities, the Plantronics .Audio 50 single earpiece PC headset has a superior noise-canceling microphone for improved speech recognition accuracy. The comfortable headband style design adjusts for left or right side wear, and allows you to hear both your surroundings and your computer. This headset features convenient inline volume and mute controls and a QuickAdjust microphone, to ensure perfect placement. Compatible with popular PC sound cards, just plug it in and start talking.   .Audio 50 Datasheet Superior speech recognition microphone Great for speech recognition, voicecommand-and-control, on-line chat,Internet telephony, and multiplayer games QuickAdjust microphone for perfect placement Swivel-mount ear cushioncan be worn on left or right side Inline volume and mute controls Just plug it in and talk Compatible with most popular sound cards Works on Windows & Mac Cord length: 2.9 Meters