Check out the kickstarter page for the product: http://www.kickstarter.com/projects/597507018/pebble-e-paper-watch-for-iphone-and-android http://www.kickstarter

Check out the kickstarter page for the product: http://www.kickstarter.com/projects/597507018/pebble-e-paper-watch-for-iphone-and-android http://www.kickstarter.com/projects/597507018/pebble-e-paper... . It's very clear about Bluetooth being the method of communication.