Plantronics M20 Bluetooth Headset - 11 Hours of Talk Time - (Non Retail Packaging) Lightweight Bluetooth headset makes hands-free calling as easy as possible; comfortably fits in either ear Resistant to wind and noise for optimal voice clarity; backward compatible Bluetooth 3.0 technology Up to 11 hours of talk time, up to 384 hours (16 days) of standby time; released in June, 2011 Voice alerts tell you talk time, volume, connection, and more More talking, less charging