Stainless steel watch featuring black sunray dial with luminous hands and date window at 3 o'clock 1.57 inch stainless steel case with mineral dial window. Crown is pull or push Japanese quartz movement with analog display and equipped with Eco-Drive, which charges in natural or indoor light Embossed faux-leather band with buckle closure. Do not charge the watch in a high-temperature environment about 60 degree celsius or more. Placing the watch near a window where its face can receive sunlight or near another source of light when you are not wearing it will ensure that the watch is regularly charged, allowing it to maintain its accuracy Water resistant to 10 m (33 ft): In general, withstands splashes and rain, but not immersion. Acceptable temperature range -10 to +60 degree celsius. When the screw lock is released, the crown pops out a little and stops in the normal position Wearing clothes with long sleeves makes it difficult for the watch to get the necessary light, resulting in insufficient charging.It is recommended to charge your watch by exposing to direct sunlight for a long time once a month. If the watch stops due to insufficient charge, take care to charge it daily.Furthermore, it is recommended to charge your watch by exposing to direct sunlight or a long time once a month.