The Big Dog Chrono Metal Redwood watch is equipped with a high-quality Japanese quartz movement time piece and a stainless steel button and clasp. Diameter of the dial is 40 mm with a chronograph dial display. Strap and case are made of metal and wood .Back has a stainless steel cover plate. No Dyes or chemicals are added to make these watches and are 100% environmentally friendly. It does more than just benefit the environment to buy a Timetree watch. Planting trees using the hands of time, that’s the Timetree difference!