Sweat-resistant material, even at sport you don't need to take it off. With LED inside it, you can read the time even at night or under strong sunlight. The watchband is adjustable, suitable for both children and adults.   Item Name: Wristwatch Movement: Electronics Strap Material: Plastic Cement Mirror Material: Plastic Display Type: Number Buckle Type: Magnet Power by: 2 x AG3 Battery (Included) Quantity: 1Pc Waterproof: No Occasion: Leisure, Office, Sport, Travel, School, etc. Feature: Luminous, Adjustable Watchband, Screen Touching Dial Diameter: 19.5mm/0.77in (Approx.) Thickness: 9.9mm/0.39in (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.   Package Included: 1 x Wristwatch