Technical Details Streams music and audio from your smartphone; noise and wind resistant for clear calls Voice alerts tell you talk time, volume, connection, and more iPhone displays headset battery meter so you"ll always have time to talk Up to 11 hours of talk time, up to 384 hours (16 days) of standby time What"s in the Box: headset, ear hook, Micro USB AC Charger, operating instructions Block noise and wind from calls Comfortably fits either ear Pair 2 phones and take a call from either Stream tunes and podcasts iPhone dispays headset battery meterWhat"s in the BoxPlantronics M50 headset, ear hook, charger, Micro USB AC Charger (US); operating instructions