30M Water Resistant Water resistant to 100ft (30m).Suitable for everyday use. Splash/rain resistant. Not suitable for showering, bathing, swimming, snorkelling and water related work. Automatic Movement Built-in 21 bearings to improve winding efficiency and power reserve. 21,600 vibrations per hour.Power can be reserved 45 hours. Luminescent Dial This watch will glow in the dark after absorbed enough light energy.large hour markers and hands, easy to read.Since It is non-self-luminous, you must illuminate it with the bright light to activate the luminous function. Multifunctional Dial Multifunctional：self windding, hollow flywheel design, full date display window with year, month, week, day. High Quality Mineral Glass Wear-resistant, scratch-resistant and waterproof, it can effectively extend the life of the watch. Stainless Steel Strap The watch is made of solid stainless steel seven-ball bracelet, which is polished with high hardness, good toughness and comfortable to wear.Comes with free link removal tool that you can easily custom the desired wrist size at home.