BlueAnt X3 Micro Bluetooth Headset Talk and Standby Time: 7 hours of Talk Time, 180 hours Standby Time. Sound Quality: High Quality Full Duplex Headset Multi-Connect Call Switching Technology: Pair three different devices to the headset and connect to any when requested. Sleek Form Factor: Tiny ergonomic design fits snuggly into ear 52 x 26 x 28mm. Lightweight (13grams) and comfortable so you hardly notice you are wearing it. The Multi-Function Button provides simple control of the headset. LED lights can be switched off for night time driving. Bluetooth Technology: Designed using the new Bluetooth v1.2 technology. Supports Headset and Handsfree Profiles. Works with a Bluetooth enabled computer for voice calls. Three Charging Options: Plug into a PC / Macs USB Port. Plug into the Car charger. Plug into an AC Charger. All these options are provided in the box.