100% New and High Quality!!! ,size: 21cm *17.55mm *10.19mm ,Material: PVC,special function: Calendar, moon phase,Type: LED Waterproof Wristwatches,Digital Wristwatches,Instructions:,Display: Tap once to display the time, then displays the date, then displays the seconds;,Adjustment: Press for a few seconds, the lamp blinks, then increase the hour.after set the hour,press for a few seconds , and then tap to increase minutes.you can adjust the order in this way, minute, month, day,You can touch the middle position to see the time,it just like a jelly bracelet when the light isn't on.,