Number of Batteries: 1 Features: Alarm, Receives Calls, App Notifications, Receives Texts, Customizable Watch Faces, Digital Display, Sleep Tracker, Stopwatch, Heart Rate Monitor, On Watch Workout, Vibration Alert, Receives E-Mail, Date Function, Rechargeable, Pedometer, Quick Ship Battery Type: Lithium Ion Jewelry Closure: Buckle Power Source: Battery (included) Tech Compatibility: Android, Apple Ios Tracking Capability: Distance, Steps, Time, Activity Tracking, Heart Rate, Calories Burned, Hours Slept Watch Movement: Smart Watch Band Color: Black Dial Color: Multi-Color Metal Color: Rose Tone Case Thickness: 12.5mm Case Width: 43.2mm 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.