PREMIUM SPORTS ARTICLES: A simple and practical stopwatch, perfect for outdoor sports competitions or daily training Selection of stable materials: Our referee stopwatch is mainly made of ABC material, which is strong and sturdy, waterproof and shockproof high precision, low power consumption, light weight, very simple operation, suitablechildren's competition or other various sports. Readable Display: Our interval timer can measure up to 10 hours, laser calibrated to less than 1 or 100th of a second moreover, the numbers are clearly visible on the large display, allowing you to easily check the time and recorddata. MULTIPLE FUNCTIONS: Our workout timer has multiple recording functions to show calendar and clock such as hour, minute, second, week, month or day, 12 or 24 hour optional to meet differentneeds of your daily life Portable Sports Watch: This alarm stopwatch is specially designed for your hands, you will feel comfortable and flexible when you press the button, what's more, the stopwatch lanyard allows you to hang it around of your neck toeasy transport events.