Features: Stainless steel Case FKM Rubber Anallergic Polymer Strap Automatic Movement Side Propeller (Caliber: Miyota 9015) Automatic movement Side Open Heart (Caliber: Miyota 90S5) K1- Gorilla Glass White Dial Analog Display Twin Dial: Chronograph Open Heart Power Reserve Upto 42 Hours High Frequency With 28800hz Rim Face Function: 3 Hands Auto Propeller Face Function: 3 Hands Auto With Turning Bezel Secondary Face Functions:3h Open Heart Plating: Grade A IPB (0.6 Mic Tic ±20%, PVD) Crown: Pull Crown With Double O-Ring Buckle Clasp 100M Water Resistance Approximate Case Diameter: 48mm Approximate Case Thickness: 22.30mm Reversible Watch Design The Reverse System Allows The Case To Be Inverted Fully In Both Directions. A Quick-Release Catch Releases The Crown From Its Protection By Rotating The Crown Protector. Two Special Arms Allow The Case To Rotate Freely, And A Clearly Recognizable Click Tells You When The Case Is In The Correct Position To Be Locked Back Into Place. One Simple Maneuver Transforms The RIM Sport Into An Elegant And Sporty Chronograph Watch.