A quick look at your wrist shows your daily steps, calories burned, calories remaining for the day, water/caffeine intake and more. Galaxy Fit monitors your sleep patterns, and will even send you real-time alerts detecting a high or low heart rate.Number of Batteries: 1Included: 1 Watch(es)Features: App Download Required, Rechargeable Battery, Bluetooth Compatible, Adjustable, Multi-Function, AlarmBattery Type: Lithium IonPower Source: Battery (included)Tech Compatibility: Android, Apple IosTracking Capability: Sleep Quality, Distance, StepsWatch Movement: Smart WatchBand Color: BlackDial Color: BlackMetal Color: BlackBand Content: SiliconeCase Materials: 100% Stainless SteelCare: Wipe CleanCountry of Origin: Imported