Imported battery which can provide the watch strong power. Easy to check the week and date,more convenient. PRECISE TIME KEEPING: Accuracy within seconds per month. 5TM waterproof. 164 ft waterproof (50 M) - 5ATM. Perfect for all kind of sports, indoor and outdoor activities or daily use. NOTE: please DO NOT press any buttons in the water. GIFT IDEA: affordable and good quality, it’s a great gift for families or friends
