Number of Batteries: 1 Features: Customizable Watch Faces, Heart Rate Monitor, On Watch Workout, Alarm, Sleep Tracker, App Notifications, Digital Display, Receives E-Mail, Date Function, Pedometer, Receives Texts, Rechargeable, Vibration Alert, Stopwatch, Receives Calls, Quick Ship Battery Type: Lithium Ion Jewelry Closure: Buckle Power Source: Battery (included) Tech Compatibility: Android, Apple Ios Tracking Capability: Distance, Activity Tracking, Steps, Hours Slept, Heart Rate, Time, Calories Burned Watch Movement: Smart Watch Band Color: Blue Dial Color: Multi-Color Metal Color: Blue Case Thickness: 12mm Case Width: 46mm 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.