Zero Adjustment of the Second Hand:By Alternately Operating the Buttons on Both Sides, the Two Clock and Second HandsAnd the Hour Hand Can Be Moved to the Position of 12 O 'clock According ToThe Direction of Pin Hole on the Back of the Clock. in the Game Clock,The Minute Hand Zero Judgment Takes the Minute Hand to Push the Judgment Mark "little Red Flag" to the Right to Reach the Position of 12, and the Scale Pointed by the Minute Hand at the Moment when "little Red Flag" Falls Freely is ZeroConfiguration:Product Name: Wooden TimerProduct Material: PlasticProduct Second Hand: 12sMinimum Scale Value: 3 SecondsProduct Net Weight: 400gProduct Packaging: Color BoxProduct Specifications: StandardProduct Volume: 150*55*90mmProduct Packaging:1 * Chess1 * Packing Box1 * User ManualNotice:1. Due to the Light and Screen Difference, the Item's Color May Be Slightly Different from the Pictures2. Please Allow 0.5-2cm Differences Due to Manual Measurement