G-Shock has released the follow-up to their Bluetooth-equipped smartwatch released earlier this year. The new GB-5600AA comes in fresh colors including light blue, bright white, dark brown, and a subtle black. Via Bluetooth the watch communicates with the iPhone 4S and iPhone 5. Like with earlier models, synchronizing the watch with users’ cell phones through the G-Shock+ app provides relevant features. Incoming calls are visible on the display as are emails, Facebook notifications and Twitter updates. Perhaps the most innovative feature is the automatic vibration felt when a user’s iPhone is left elsewhere. The GB-5600AA notifies users and through the finder function activates your phone’s alarm.