Features: High quality battery and digital movement for accurate time keeping. Excellent zinc alloy case and stainless steel case back make the watch tough and durable. High hardness glass mirror have high definition. Backlight function makes you see time clearly even at night. 3ATM waterproof, you can wear it washing or cold bathing, but not for swimming. Functions: stopwatch, water-resistant, luminous, back light, alarm, chronograph, calendar, week, moon phase, 24 hours. Perfect for business, casual, indoor and outdoor activities or daily use.