Number of Batteries: 1 Included: 100 Watch(es) Features: App Notifications, Touch Screen Enabled, Digital Display, Pedometer, Stopwatch, Customizable Watch Faces, Alarm, Date Function, Rechargeable, Quick Ship Battery Type: Lithium Ion Jewelry Closure: Buckle Power Source: Battery (included) Tech Compatibility: Apple Ios, Android Tracking Capability: Calories Burned, Time, Heart Rate, Activity Tracking, Distance, Steps Watch Movement: Smart Watch Water Resistance: 10m Band Color: Black Dial Color: Multi-Color Metal Color: Black Case Thickness: 12mm Case Width: 44mm Watch Band Length: 9 1/2 Inch Band Content: Silicone Case Materials: 100% Metal Alloy Band Width: 20mm Care: Wipe Clean Country of Origin: Imported Quick Ship items ship directly from the manufacturer within 3 to 5 business days. Photos are enlarged to show detail.