This Forsining automatic analog watch offers all the convenience and durability of a fashion watch, with an adaptable style well suited for a work day. Functions Without A Battery, Powers Automatically With The Movement Of Your Arms. Fully winding up spring need be turn the crown 15 rounds. If wearing more than 10 hours each days, extra winding up will not be necessary. All the small arrows on the watch can work .The band is made out of stainless steel with a quality stainless clasp. Stainless steel Crown And Caseback. It is backed by a 90 days limited manufacturer's warranty. Watch Information Brand, Seller, or Collection Name FORSINING Dial window material type Hardlex Case diameter 46 centimeters Band Material Stainless steel, Stainless Steel Bezel material Stainless steel Bezel function Calendar Calendar month-day-week Special features mechanical Item weight 5.28 Ounces Movement Automatic self wind Package included: -1 * Watch -1 * Gift Box. -1 * Manual Instruction. Please give us a five-star feedback if you are satisfied with our products and service. Reminder: 1. Please peel all films off before wearing. 2. Please keep the watch away from magnet to avoid making the watch stop working. 3. Please wind up the watch before every usage.