Pebble Time Round 14mm Smartwatch for Apple/Android Devices - Silver/Stone The world's lightest and thinnest smart watch. Probably the most comfortable too. At 7.5mm thin and weighing just 28 grams, Pebble Time Round is the thinnest and lightest smartwatch in the world Includes Pebble Health, a built-in activity and sleep tracker with daily reports and weekly insights Full suite of Pebble features, including timeline calendar alerts, notifications, and silent alarms Splash resistant so you can live your life like normal;Compatible with Android and iPhone Battery provides power for up to 2 days, and recharges fast: add a day of power in just 15 minutes; 14MM Quick-change bands and downloadable watch faces and apps for easy personalization