Get fit in style with Fitbit Blaze a smart fitness watch that helps you maximize every workout and every day. With advanced technology in a versatile design, this revolutionary device is built to track your workouts, monitor your performance stats, and gauge your progress. PurePulse continuous heart rate and multi-sport modes enhance every exercise, while next-generation features like Connected GPS and FitStar workouts on your wrist help you take your fitness to the next level. All-day activity and sleep tracking and call, text & calendar notifications help you track your day with ease. And interchangeable band and frames and customizable clock faces on the hi-res Colour touchscreen let you personalize your style for every occasion. With all this and more, Fitbit Blaze has everything you need to reach your goals, packed into one sleek time piece. Synchronize: Fitbit Blaze syncs wirelessly to 200+ leading iOS, Android and Windows devices using Bluetooth 4.0 wireless technology. Syncing range: 20 feet Notifications: Text and call via Bluetooth 4.0 Music control: via Bluetooth Classic Syncing to mobile devices requires Bluetooth and Internet connection Syncs with Windows Vista and later, Mac OS X 10.6 and up, iPhone 4S and later, iPad 3 gen. and later, and leading Android and Windows devices. Battery and Power: We recommend charging Fitbit Blaze every few days to ensure you are always tracking. Battery life: lasts up to 5 days Battery type: Lithium-polymer Charge time: One to two hours Radio transceiver: Bluetooth 4.0