Megir Mens Military Chronograph Stainless Steel Quartz Wrist Watches White Square Dial Imported Quartz movement with Luminous hands, date Case diameter: 40*40 mm approx, Big Bang luxury design Stainless Steel strap , comfortable to wear 3 workable sub-dials for chronograph minute,second and 1/10 second "Water resistant to 99 feet (30 M): with stands rain and splashes of water, but not showering or submersion"