Number of Batteries: 1 Features: Alarm, Water Resistant, Date Function, Stopwatch, Gps, Receives E-Mail, Receives Texts, Smartphone Compatible, App Notifications, Customizable Watch Faces, Receives Calls, Touch Screen Enabled, Caller Id, App Download Required, Sleep Tracker, Bluetooth Compatible, Adjustable, Multi-Function, Pedometer, Heart Rate Monitor, Light-Up, Rechargeable, Quick Ship Battery Type: Rechargeable Jewelry Closure: Buckle Power Source: Battery (included) Tech Compatibility: Android, Apple Ios Tracking Capability: Sleep Quality, Steps, Distance, Heart Rate, Hours Slept, Calories Burned, Time, Activity Tracking, Floors Climbed Watch Movement: Smart Watch Water Resistance: 10m Band Color: Silver Tone Dial Color: Black Metal Color: Black Case Thickness: 12.2mm Case Width: 12.8mm Watch Band Length: 9 1/2 Inch Band Content: Polyurethane Case Materials: 100% Plastic Band Width: 13mm 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.