能用三位数来显示在一分钟内脉搏的跳动次数，并在一分钟之后保持数据不消失，便于观察。 在人体的脉搏跳动过快时，脉搏测试仪会亮红灯并发出报警信号。具有超常报警功能。-Can be used to display three-digit minutes in a pulse frequency, and after a minute to keep the data do not disappear, easy to observe. In the body s pulse beating to