Multi-flashing LED light modes. Stopwatch Alarm 12/24-hour systems. Weight : 80g， Water resistant / Not for swimming/showering. Watch Case Size: Approx 4.00x4.70 cm Watch Case Material: Alloy<br />Watch Dial Color: Black<br />Width Of Watch Belt: Approx 2.10cm<br />Watch Belt Material: Silicone<br />Watch Belt Color: Black<br />Length Of Watch: Approx 23.50cm&nbsp;<br />Daily Water Resistant (not for swimming or showering): Yes<br />(2.54cm=1.00inch)<br />Item Shap:Rectangle!#!amp!*!Plane Style<br /><br />Instruction:<br /><br />1. Turn on/ change light effects:<br />Press the A button to turn on the effects.<br />Hold A at least 3 seconds for changing light effect.<br />2. Check date:<br />Press C only once at standard time indication.<br />3. Stopwatch:<br />Press B once and C to start/ pause the stopwatch<br />Press D for recovering.<br />4. Set alarm time:<br />Under standard time indication， press B twice and enter into the alarm setting mode.<br />C button to set alarm and D to shift.<br />5. Turn on/ off alarm:<br />In normal mode， hold C and press D to turn on/ off alarm.<br />6. Adjust time， date， day of week:<br />Under standard time indication， press B thrice and enter into the time setting mode. C button to set time and D to shift.<br />7. Switch 12/24-hour systems:<br />Under time setting mode， 12/24-hour system can be shift while adjusting Hours.