Wireless headset with 4-microphone noise-canceling - Model Name: Voyager 5200 - Number of Microphones: 4 - Noise Canceling: Yes - WindSmart Technology: Adaptive - Auto Mute Reminder: Yes This was a gift, but I have no use for it, so I'm selling it. 4-microphone noise canceling: The Voyager 5200 is equipped with four microphones and a unique DSP to cancel background noise such as train and car traffic, and crowds, providing clear calls. Unique WindSmart technology: The proprietary 6-layer WindSmart technology detects wind direction and cuts wind noise, so your voice can be heard clearly even outdoors. Design for comfort: The shape has been tested to adapt to various ear shapes, providing a comfortable and stable fit. You can wear it all day and still feel like the last call is the first call of the day. Continuous talk time: Up to approximately 7 hours; Connection range: Up to approximately 30 meters, Bluetooth V5.0 Profiles: A2DP/AVRCP/HFP1.6/HSP1.2