Overall diameter: the front face/ bezel diameter of this insert is approx. 2.8 inch/ 70 mm; Please check the size before purchasing Suitable mounting diameter: this quartz movement fit round hole diameter of 2.4 inch/ 61 mm, suitable mounting depth is 0.7 inch/ 17 mm Appearance and surface: black Arabic numerals on white face, clear glass lens, plastic case with gold colored plastic bezel trimSA0849: Appearance and surface: black Arabic numerals on white face, clear glass lens, plastic case with silver colored plastic bezel trim Rubber band gasket: rubber band gasket securely hold the insert clock in place and allow for slight irregularity in the hole Needed power: just need 1 of 1.5 V AAA battery (not included) can run a long time