Motorola Roadster Bluetooth In-Car Speakerphone - Retail Packaging Bluetooth speakerphone with dual microphone technology for filtering out road noise Listen and dictate text messages with MotoSpeak application (requires Android 2.2 smartphone) FM transmitter allows you to listen to your calls or stream music wirelessly over your car speaker system Entry on/Exit off functionality turns on when you get into your car and off when you get out Up to 20 hours of talk time, up to 500 hours (3 weeks) of standby time