Information about Casio GB-X6900B-2ER watch : Mineral glass Quartz movement Blue resin strap & case 1/100 second stopwatch and countdown timer Alarm 12/24 h format Auto-calendar 29 time zones SUPER-AUTO-LED Light Battery level Bluetooth (iPhone 4s, 5, 5c, 5s. Samsung Galaxy S3, S3 mini. Samsung Galaxy Note 3. Samsung Galaxy S4, S4 mini. HTC One, HTC One mini compatible) Water resistance : 20 ATM = 660 feet The Casio GB-X6900B-2ER benefits from two years of manufacturer warranty.