Comfort style and intelligence all come together in the Edifice EF527D-1AV. Smaller rounded band segments allow its solid stainless steel band to hug the wrist with more comfort while a knurled bezel precision dial indexes and mineral glass give the timepiece a stylish technical look. Inside a 1/20th Chronograph and rotating Slide Rule allow for precision measurement and calculations such as time speed fuel consumption and more.100M Water Resistant. 1/20 second chronograph. Slide rule function. Date Display. Mineral Glass. Screw Lock Crown. Screw Lock Back. Solid Stainless Steel Band. Double-lock 1-press 3-fold buckle.