长按 键3s 进入调时状态，此时显示分的2个数码管闪烁，这时可进行加减调时，再按模式键，可看到显示时的2个数码管闪烁，可对时进行加减调整。再按模式键退出调整状态，进入正常工作状态。-Button to enter the transfer length when the 3s state at this time showed that two-point digital control blinking, then addition and subtraction can be transfe