Casio EDIFICE Scuderia AlphaTauri Limited Edition model ECB-20AT-2ADR Collaboration in Scuderia AlphaTauri Formula 1 team Accurate Time System: The watch automatically connects with a phone by Bluetooth to update is time setting. World Time: Settings can be configured quickly and easily using a special smartphone app. The current time in a second time zone is indicated by a dial on the face. Stopwatch: Watch memory provides storage of up to 200 lap times. 1/1000-second unit measured times can be sent to your phone. Phone Finder: Long-pressing a watch button causes a tone to sound on your phone (as long as it is within range to receive a Bluetooth signal). Auto LED Light: A high-intensity light illuminates the display when you angle the watch towards your face. Sapphire crystal with non-reflective inside surface coating vCase / bezel material: Stainless steel Genuine Leather Band Sapphire Glass with non-reflective coating Navy ion plated case 100-meter water resistance