Auspicious beginning Teens' unique waterproof LED Military plane design digital sports watch, blue Watch band material: silica gel. Length: 252mm, thickness: 14mm. Dial diameter: 48mm. For wrist: 15.5-20cm. Suitable for students 14 to 18 years old. Water resistant 5ATM (do not press button under water.) Colorful back light. Features: week, date, alarm clock, back light, stop watch, 24H time format Adjustable band: buckle watch