1.计时功能：包括时、分、秒的计时 2.定时与闹钟功能：能在设定的时间按发出闹铃声 3.校时功能：对小时、分钟和秒能手动调整以校准时间 4.整点报时功能 5.利用数码管显示时间-1. The timer function: including, minutes and seconds when the timing 2. The timing and alarm clock function: set time out according to the alarm 3.