How to use? Display: Each press on the button, it can change modes from time to date, second Setting: 1.Press the button until it shows numbers, then long press the button(about 4 secs) until the red numbers blink, now it is setting mode 2.Short press the button to adjust time. Long press the button(about 4 secs) to set the next item. The setting order is: hour, minute, year, month, day. 3. After setting, don't press the button, the setting will be saved. Specification: General People Unisex table Watch style Fashion&Casual, Bracelet Available color Red, Blue, Green, Orange, Black, Azure, White Dial Movement type Digital watch Display type Digital Band Band material Rubber Function Special features Date Water Resistance 30 meters Weight and Size The dial thickness 1 cm / 0.39 inches The dial diameter 2 cm / 0.79 inches Product size (L x W x H) 24 x 2 x 1 cm / 9.45 x 0.79 x 0.39 inches Package Contents Package contents 1 x Bracelet Watch About Water-resistant Watches Water Resistant Watches are sealed to witstand 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. Many watch cases will list the basic measurement of 1 ATM as "water-resistant." These watches will withstand small splashes of water but should not be worn while washing the hands or submerging the hands in water. Remember, water resistance is tested under static conditions. Wearing a watch which is 50 metres water resistant in 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. Here is a general guide 50M = 5ATM = Shower Proof - it's ok to get it wet a bit. 100M = 10ATM = Extended Water Exposure good for swimming or snorkeling. 200M = 20ATM = Pressure Resistant made for Scuba and Skin Diving.