With a luminous function, this watch is very easy to use as it allows you to read the time clearly at night. And the chronograph design is also very convenient for your time. Durable watch is suitable for Daily waterproof, such as splash water, rain, washing hands and face. But it's not suitable for swimming, diving, snorkeling and shower, etc. Made of good silicone material, this watch is very wear-resistant and durable. Dial length is 3.4cm, width is 3.4cm. This smart watch is suitable for outdoor activities such as running, jogging and so on. Item Name: Watch Material: Silicone Style: Sporty Crowd: Universal Battery: 1 x Button Battery (Included) Waterproof Grade: Daily Life Waterproof Features: Durable, LED Display, Wear-resistant Size Details: Dial Length: 3.4cm/1.34" (Approx.) Dial Width: 3.4cm/1.34" (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 Watch