I n t r o d u c t i o n41. IntroductionWith the Nokia Bluetooth Stereo Headset BH-604 you can listen tomusic from your compatible music player and make and receivehands-free calls using your mobile phone. The music player can be themusic player feature of your mobile phone or a separate music device.You can use the headset with compatible devices that supportBluetooth wireless technology.Read this user guide carefully before using the headset. Also read theuser guide for your mobile phone, which provides important safety andmaintenance information, and the user guide for your music device.Keep the headset and its accessories out of reach of small children.■ Bluetooth wireless technologyBluetooth wireless technology allowsyou to connect compatible deviceswithout cables. A Bluetoothconnection does not require that theheadset and the other device be in lineof sight, but the maximum distancebetween the devices is 10 meters(30 feet). The closer the devices are toeach other, the better is theperformance. The optimal operatingrange is shown in dark grey in thepicture. The connection is subject to interference from distance andobstructions (shown in light grey) or other electronic devices.The headset is compliant with Bluetooth Specification 2.0 + EDRsupporting the following profiles: Headset Profile 1.1, Hands-FreeProfile 1.5, Advanced Audio Distribution Profile (A2DP) 1.0, and AudioVideo Remote Control Profile 1.0. Check with the manufacturers ofother devices to determine their compatibility with this device.