Andrea Communications BT-201 Bluetooth Monaural headset with premium noise canceling microphone for enhancing mobile communications in noisy environments.  Includes USB charger and multiple accessories in Retail Packaging. 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. One touch button operation for call, answer, end and volume control. Provides longer talk time between charges than with a digital processing devices with same battery size/type, 6~8 hours talk time, 150 hours standby. Headset operates up to 30 feet from handset. Compatible with PCs utilizing Windows 7, Windows 8, and Apple Macintosh Computers.