Fangrui Product Details Made Of Wooden Casing And Copper-zinc Alloy Movement, Safe, Environmentally Friendly And . This Chess Clock Does Not Require Batteries, Is Driven By A Clockwork, And Is Easy To Use, Similar To The Operation Of A Quartz Clock. Clock Adopts A Mechanical Structure With A Timing Start Button. Timing Operation Is Intuitive, Convenient, Accurate, And The Daily Error Is Not More Than 1 Second. It Is Suitable For Timing Clocks For Various Chess Games. Suitable For Personal Family Use, Teaching Use And Various Types Of Chess Games, Such As Chess, Chinese Chess, Go And . Maintenance: The Chess Clock Should Be Prevented From Contact With Materials, And Avoid Exposure To The Sun, Rain, Falling And Close To Strong Magnetic Fields. Specification: Colour:wood Color Material:wood+plastic+metal Size:15x5.5x9cm Package Contents: 1 * Wooden Chess Timer Only The Above Package Content, Other Products Are Not Included. Note: Light And Different Displays May Cause The Color Of The Item In The Picture A Little Different Fro