: If your primary goal is the absolute best call clarity, the Roadster Pro

The was a premium Bluetooth in-car speakerphone designed for those seeking high-quality hands-free calling without a headset. While it was previously a staple at retailers like Best Buy , it is an older model and is currently difficult to find brand-new at major retail stores. Key Features and Performance

: It uses a motion sensor to automatically power on when you enter the car and shut down when you leave to save battery.