Features: High quality battery and digital movement for accurate time keeping. Excellent ABS plastic case and stainless steel case back make the watch tough and durable. The Acylic crystals can avoid exploding and 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, 12/24 hours. Perfect for business, casual, indoor and outdoor activities or daily use.