The Jabra C500 is a stylish, lightweight, behind-the-ear headset with built-in miniature microphone boom for optimal voice pick-up specifically designed for use with NEXTEL phones. Listening quality is optimized by the high-sensitivity miniature speaker and Jabra MiniGel, which channels sound into your ear. Every conversation becomes an enjoyable experience with the contoured earpiece that fits discreetly behind either ear for a comfortable and secure fit. The convenient multi-function button located right at your fingertips on the microphone boom allows you to Push-To-Talk or answer/end calls. Also includes the handy mute switch on the boom that is great if you¿re on conference calls.