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I believe it's for the charging case to connect
Sorry, there was a problem. Please try again later.That is the charging port for use with the charging cradle.
Sorry, there was a problem. Please try again later.Hi Donna! The Voyager 3220 has a port underneath the microphone boom, specifically designed for the portable charging case. In case you don't purchase the case, it counts with a micro-USB port on the head of the earpiece so you can plug a micro-USB charging cable. If you have any further questions, feel free to contact our Customer Care Team at: 1-888-363-0726.
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