"Size : Small and Large
Sensors and Components :
•LED display with 5 white indicator lights
•Tap twice to see progress against your Main Goal
•Tap rapidly for 1-2 seconds to start or stop sleep tracking
-Water Resistance :
Charge HR is sweat, rain and splash proof. However, the device is not swim proof or showerproof. With any wearable device, it’s best for your skin if the band stays dry and clean.
-Materials: The Flex wristband is made of a flexible, durable elastomer material similar to that used in many sports watches.
-Battery and Power :
•Battery life: up to 5 days
•Battery type: Lithium-polymer
•Charge time: One to two hours
•Radio transceiver: Bluetooth 4.0
-Environmental Requirements :
•Operating temperature: -4° to 113°F
•Maximum operating altitude: 30,000 feet
•Tracks 7 days of detailed motion data, minute by minute
•Tracks daily totals for past 30 days
Flex syncs automatically and wirelessly to tablets, computers and 150+ leading iOS, Android and Windows smartphones using Bluetooth 4.0 wireless technology.
•Syncing range: 20 feet
•Syncing to computers requires Internet connection and USB port
•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."