You can enjoy clear and delicate image effect due to the high-resolution screen. The waterproof and soft material of the smart watch brings you comfortable daily wearing experience. The main functions of this smart watch can be enumerated as follows: universal time, calendar and night light. And it has accurate time and it is waterproof. It is constructed of TPU material. The length of this product is 3.7cm and width is 3.45cm. Thickness is 1cm. It is suitable for both students and children. Item Name: Digital Wristwatch Material: TPU Style: Sports Operation Mode: Push-Button Display Type: Digital Movement Type: Electronic Battery Voltage: 3V Battery: 1 x CR2032 Button Battery (including) Waterproof Grade: Life Waterproof Working Temperature: -20 Degree Celsius to 40 Degree Celsius Special Functions: Decoration, Luminous, Calendar, World Time Applicable Crowd: Universal Size Details: LxW: 3.7cm x 3.45cm/1.46" x 1.36" (Approx.) Thickness: 1cm/0.4" (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 Includes: 1 x Digital Wristwatch