... hour voice recording External Link : UART port / IrDA port Automatic and operator initiated Self-Test (Power on / Run time ... , Mode/Energy Select, CHARGE, DISARM, SYNC, , Plethysmographic wave display ON/OFF, Monitor Alarm Menu, Alarm SilenceIndicatorsElectroluminescent back lit ... Liquid Crystal Display for ECG waveform and Plethysmographic wave, text prompts, Alarm indicators, and Menu Operation ...