LED digital military watch for men Equipped with alarm clock function Japanese chipset, provide precise time keeping Water resistant is convenient for daily life Please don't pressany button underwater and wipe the watch after swimming 12/24h system and dual time display let you to switch the time more freely. Alarm report punctually and snooze function make your life more comfortable and convenient. Auto calendar, set the right date, week at the beginning and it will run automatically Measurements: Watch case diameter: 53mm Watch case thickness: 17mm Size of band width: 22mm Size of band: 150-230mm Watch Weight: 78 g Material: Window: Senior acrylic mirror Clasp: Stainless steel Band: Environmental protection rubber band Case: Engineering ABS plastic ABOUT WATER-RESISTANT: Water Resistant Watches are sealed to withstand some pressure. Water resistance is tested in measurements of atmosphere (ATM). Each ATM denotes 10 meters of static water pressure. This is not the depth to which a watch can be worn. Remember, water resistance is tested under static conditions. Wearing a watch which is 50 metres water resistant to water will expose the watch to a much greater pressure than during a 50-metre static test. Therefore the number of metres shown on the watch does not indicate the depth that the watch can be taken to.