The Voyager Focus 2 UC Stereo Bluetooth Headset from Poly creates a focus zone around you, helping to ensure that all you hear is your call, thanks to three levels of hybrid active noise cancelation (ANC). This headset also employs two digital MEMS microphones and two analog EMC microphones with Poly Acoustic Fence technology that help background noise to make your voice more clear. Designed for high comfort and versatility for unified communications applications, this Zoom certified on-ear headset features a flexible boom. Additionally, the Voyager Focus 2 may be simultaneously connected to two separate Bluetooth devices for easy switching, and it remembers up to eight devices. A BT700 USB-A dongle is included to add Bluetooth 5.1 support to laptops and desktop computers.