1.八段数码管的显示；2、A/D的转换(毫伏表)；3、时钟显示及时间设定；4、呼吸灯；5、按键的设置功能及按键声音；6、A/D的报警功-1. Ba Duan digital tube display　2, A/D conversion (mV table)　3, the clock display and time settings　4 respiratory light　5, buttons and button set features the voice　6, A/D, alarm function