系统上电复位后有提示音，显示屏1602A中显示相关键盘控制信息，K1键控制蜂鸣器运行或停止，K2键为进入调整状态或为调整确认，K3键使参数值加1，K4键使参数值减1。-System after power-on reset tone, 1602A display to display information related to the keyboard control, K1 key control to run or stop the buzzer, K2 key to enter the adjustment for the adjustment of status or recognition, K3 key parameter values increase so that 1, K4 key parameter values so that by 1.