Built-in CSR chipset BC-02 Version:1.1 Communication range: 10m Talk time: 4 hours Standby time: 100 hours Light weight 12.8g (not including desktop charger) Rechargeable 130mAh Lithium-ion Polymer battery - Update: 2005-06-26

Communication range: 10m Ergonomic design PIN code security Rechargeable battery Talk time: 6 hours Standby time: 140 hours Compatible with all the Bluetooth mobile phones Version:1.1 Accessories: user manual, Necklace and hook, earplug s... - Update: 2005-06-26

Communication range: 10m Ergonomic design PIN code security Rechargeable battery Talk time: 4-5 hours Standby time: 128 hours Compatible with all the Bluetooth mobile phones Version:1.1 Accessories: user manual, ear hook, travel charger 1... - Update: 2005-06-26