Features: Stainless Steel Case Leather Strap Mineral Crystal Black Dial Solar Powered Analog Digital Display Chronograph Function Tachymeter Scale Smartphone Link Functions Automatic Time Adjustment Average Speed Indicator World Time 1/1000 Second Stopwatch Double Led Light Countdown Timer Alarms Hourly Time Signal Hand Shift Feature Battery Level Indicator Full Auto Calendar 12/24 Hours Display Button Operation Tone On/Off Day And Date Display Luminous Hands Screwed Case Back Buckle Clasp 100m Water Resistance Approximate Case Diameter: 48mm Approximate Case Thickness: 14mm Approximate Lug Width: 22mm