Motorola H550 Bluetooth Headset (Black) Clear Voice - loudest headset with improved audio performance and interference reduction Supreme Comfort - Lightweight and comfortable with interchangeable earhooks for maximum comfort and secure fit allowing for extended periods of use Talk Time up to 8 hours with 200 hours (8 days) of standby time Hands-free, wire-free connection up to 10 meters (30 feet) from a Bluetooth-enabled mobile phone Bluetooth version v2.0 with EDR