Features: Resin Case Resin Strap Quartz Movement Caliber: 3511 Resin Crystal Digital Display Dual Time LED Light 3 Multi Function Alarms Button Operation Tone On/Off 1/100 Second Stopwatch Countdown Timer Hourly Time Signal Regular Timekeeping Full Auto Calendar 12/24 Hours Display Day And Date Display Screwed Case Back Buckle Clasp 100m Water Resistance Approximate Case Diameter: 44.5mm Approximate Case Thickness: 13.4mm Approximate Lug Width: 19mm