Casio Classic Sports Chronograph Alarm F 91W 3SDG F91W 3SDG Men's Watch COA:SIN 15mm Approximate Case Thickness: 13 Size:38mm 15mm Approximate Case Thickness: 13 no need to change battery) Sapphire Glass White Dial Black Roman Numerals Insufficient Charge Warning Function Overcharge Prevention Function Time Setting Warning Splash Water Resistance Case Diameter 39mm Case Thickness 4 5mm Item Number: F 91W 3SDG Condition: Brand new in box with tags Gender: Male Case Diameter: Water Resistance Depth: 30M Case Thickness: Lug Width: Caliber: Dial Material: Display Type: digital item_weight: 500 g Movement: japanese quartz Description: Features: Resin Case Resin Strap Chronograph Function Measurement Mode 1 100 Second Digital Stopwatch Daily Alarm Micro Light Auto Calendar Hourly Time Signal 12 24 Hour Formats AM PM Display Accuracy: + 30 Seconds Per Month Day Dispay 30M Water Resistance Approximate Size Of Case: 38 let us know