Auspicious Beginning LED Military Cool Waterproof Noctilucent Plane Design Digital Watch for Boys Size S Watch band material: silica gel. Case material: alloy. Size S: Dial 3.6*4.2cm. Suitable for children 6-13 years old. Water resist: 50M (do not press button under water.) Features: week, calendar, alarm clock, back light, stop watch, 24H time format Colorful back light. Exquisite packaging box