1[Classic simulation style]: This alarm clock chess timer is the perfect complement to any game or classroom game. It bears the Royal Chess logo and looks more formal. If you want to make the game more competitive, then this clock is a good way to improve. 2[Easy to use]: This lightweight and portable chess clock is easy to operate, just click a button! Press the button on the top to start and stop the machine, but you can freeze the two clocks by keeping the buttons at an even level. Both clocks are easy to reset on the back, and each top button has a locking clip. 3[High quality]: This game timer has a clock that uses an electronic oscillator adjusted by a crystal to keep time. The frequency accuracy produced by the crystal oscillator makes the clock at least an order of magnitude more accurate than the mechanical clock. The sturdy black plastic shell is reliable in structure and can stand the test of time. 4[Hello]: The benefits of chess are huge. Children who participate in chess can improve their critical thinking, problem-solving skills, spatial awareness and social skills, which makes it an important supplement to any classroom or family. 5[Widely used]: Suitable for Chinese Chess, International Chess. No battery winding mechanism is required to ensure that you can replace the battery without interrupting the game. 6Instructions: 7 To operate the timing button, press the left button, the left clock stops timing, and the right clock starts timing. On the contrary, press the right button, the right side will stop timing, the left side will start timing, and the buttons on both sides will be pressed halfway (that is, the buttons on both sides are in the same horizontal position), and both clocks are in the stop timing state. 8 Adjusting the zero position of the second hand. By alternately operating the buttons on both sides, you can adjust the two clock seconds hands to the 12 o'clock position (zero position) in sequence, and move the hour hand in the direction of the arrow on the needle hole on the back of the clock to move the minute hand to the 12 o'clock position. In the game clock, the zero position of the minute hand is judged with the minute hand pushing the hourly point determination mark "Little Red Flag" to the right to reach the 12 o'clock position, and the scale of the instant minute hand with the "Little Red Flag" freely falling is the zero position. 9 For maintenance, the chess clock should be prevented from contact with corrosive materials, and avoid exposure to the sun, rain, falling and close to strong magnetic fields.