Product description: Function mode switch: 1) press the button start LED display start animation; 2) order mode, click on the button to choose time date pattern, plan the second mode;(note: hours in front of the small dot display said PM time) Time to adjust operation: 1) first click on the button, the screen will automatically display number, long press 3 s fixed hours digital display lights twinkling state, then press a short time down to set the current value; 2) hours after set, press 3 know minutes longer display lights twinkling, then short press the down to adjust the current value; 3) minutes set again long by 3 s to switch to the year after the completion of setting, Y show on behalf of the year, the year of short press set the current value; 4) set the date and year later, you can watch out LED screen light nature, such as after the lights went out again by bright screen display is set good parameters. Surface Material: Acrylic Display: Digital Strap Material: Silicone Size:5*1.8cm Band Length: 22.5cm/8.9inch Note: 1: As the company computers display colors differently, the color of the actual item may than slightly from the above images. 2: both please allow 1-3 cm differs due to manual measurement. 3: both Please note 1 cm = 0.39 inch Thanks for your understanding. Component that included: Watch x 1