Bose Bluetooth Headset Series 2 - Right Ear Exclusive Bose technologies let you hear calls better, even as noise levels change Noise-rejecting microphone allows callers to hear more of your voice-in windy and noisy environments too A2DP Bluetooth profile enables mobile media content, like music or podcasts, from your smartphone Simple, convenient controls make it easy to answer calls,Side-specific design for the fit you prefer Rechargeable lithium-ion battery provides up to 4.5 hours of talk time and 100 hours of standby time per charge