1. Product size: 235x34x5mm weight: 25g
2. Functions: Date display time display complete calendar waterproof
3. Features: Strong durable ultra-light
4. Battery life can be as long as 1 to 2 years (battery can be replaced)
5. Use Guide: Built-in LED display 12-hour timing method is pressed once display time is pressed again display date is pressed for the third time display the second time/date setting press this button for 3 seconds. After the hour flickers press this button to adjust the hour. When the hour flickers press long to adjust the minute. Set the year month day in the same way
6. Material: Dupont Paper