Features: Resin Case Resin Strap Quartz Movement Resin Crystal Black Dial Digital Display Mobile Link (Wireless Linking Using Bluetooth) Step Tracker Auto Time Adjustment Easy Watch Setting Approximately 300 World Time Cities Life Log Data Stopwatch Data Transfer Time And Place Phone Finder Dual Time 1/100 Second Stopwatch Countdown Timer 5 Daily Alarms Hourly Time Signal LED Backlight Afterglow Button Operation Tone On/Off Power Saving On/Off Regular Timekeeping 12/24 Hours Display Day And Date Display Screwed Case Back Buckle Clasp 100M Water Resistance Approximate Case Diameter: 41.30 mm Approximate Case Thickness: 11.60 mm nbsp;