An automatic standby function turns the unit off after 2 minutes when no phone is paired and reactivates the SmartTalk and pairs with your phone again when its accelerometer-based motion sensor detects that you've reentered the car. The ideal way to use the Griffin SmartTalk Solar is to mount it on a discreet corner of your windshield and just leave it there, always charging.
Basic hands-free calling
Outside of the solar-charging gimmick, the SmartTalk Solar is a fairly basic Bluetooth speakerphone. It features no voice command, text-to-speech, or audible caller ID of its own. Incoming calls are announced with a cutesy version of Wagner's "Ride of the Valkyries" and answered by tapping the large multifunction button.
Initiating a call must be handled by the paired phone. Fortunately, you can tap the SmartTalk Solar's multifunction button to trigger the handset's native voice dialer (if such a function is supported by the paired phone). Additionally, a double-tap of the multifunction button will redial the last number called.