Andrea Electronics BT-200 Noise Canceling Bluetooth Headset Best technology for microphone noise cancelation, enhanced speech intelligibility and wind noise suppression Military grade noise cancellation (NC) boom microphone (providing approximately 20dB of noise reduction) Microphone tip has integrated wind suppression (for 11.5dB of wind noise reduction) Multi-device Bluetooth pairing. Bundled with USB receiver which enables wireless PC connection to Bluetooth headset