Hear your calls, even as noise levels change, thanks to the proprietary technologies in the Bose Bluetooth headset Series 2. In addition, a noise-rejecting microphone system lets callers hear you, even when you're calling from a windy or noisy environment. The flexible StayHear tip provides comfort and stability, while A2DP streaming delivers audio content. Includes StayHear tips in three sizes, a USB cable, wall charger and case. Available in right- and left-side.