Plantronics M20 Bluetooth Headset - Retail Packaging - Graphite/Black Fights Noise and Wind More talking, less charging iPhone displays headset battery meter Power switch lets you extend battery life Voice alerts tell you talk time, volume, connection, and more 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 Pair two phones and take a call from either one; iPhone displays headset battery meter Up to 11 hours of talk time, up to 384 hours (16 days) of standby time What's in the Box: Bluetooth headset, charger, quickstart guide