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
