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Feature
24/7 timekeeping & activity tracking.Automatic time sync: provides information on daily steps, distance, calories burned, sleep duration & cycles etc.
No charging necessary: long lasting lithium battery
"High quality: Aluminium case ( 1.5in / 38mm), Scratch-proof mineral glass, Silicone strap, waterproof up to 300ft/ 100m".
Supported devices: iPhone 4S/5/5s/5c/6/6 Plus, Android: Bluetooth Smart Ready devices running Android 4.3 or higher, Windows Phone: Bluetooth Smart Ready devices running WP8.1 or higher.