Material: high-quality plastic strap
Waterproof: 30M waterproof
Size Reference: Dial width， height， thickness: 4.1 * 4.2 * 1.4， strap length 24cm
Instructions for use:
When the need to set up， press the button at the top right corner， let the light of the screen lights up， then quickly press before the light did not go out at the bottom right button to enter the setup mode. First hour position flashing， then press the button on the upper right corner， the number is incremented. To tune a good tune-hour points， then click on the bottom right button， then the minutes position flashes， set the method above. Next month can be adjusted by the same method， date， year and time switching system.