never used with charger Enjoy the clearest calls with HD voice and 2-microphone noise cancellation technology that adjusts the volume to your environment, making sure that No matter where you are, you can hear above the noise around you. Choose your preferred wearing style and, with the ultimate comfort ear gels that come in many sizes and mold to your ear, you have a custom fit for all-day comfort. With up to 6 hours of calls and up to 9 days of standby time, make reliable Bluetooth wireless calls throughout the day on a single charge. Talk 35 gets the most out of your media, letting your wirelessly stream GPS directions, music and podcasts from your mobile phone.