This comfortable earset features a Windows Live Call Button that makes calling fast and easy, wireless 2.4-GHz technology up to 30 feet, and an advanced battery that lets you talk up to eight hours between charges. Comfortable earpiece and two adjustable earbands for a custom fit Four LEDs indicate out-of-range, battery life, charging, and connection status Rechargeable with Eight Hours of Talk Time Compatibility with Microsoft Windows based computer.