Number of Batteries: 1 Features: On Watch Workout, Heart Rate Monitor, Alarm, Rechargeable, Receives Calls, Date Function, App Notifications, Vibration Alert, Digital Display, Receives E-Mail, Sleep Tracker, Customizable Watch Faces, Receives Texts, Pedometer, Stopwatch, Quick Ship Battery Type: Lithium Ion Jewelry Closure: Buckle Power Source: Battery (included) Tech Compatibility: Apple Ios, Android Tracking Capability: Activity Tracking, Hours Slept, Steps, Heart Rate, Time, Distance, Calories Burned Watch Movement: Smart Watch Band Color: Pink Dial Color: Multi-Color Metal Color: Rose Tone Case Thickness: 12mm Case Width: 40mm 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.