Model 5340 is intended for continuous pulse oximetry and has visual and audible alarms to aid with patient monitoring. Features: Intended for continuous pulse oximetry Ideal for most users and situations A portable pulse oximeter with alarms and two bright LED displays 12-hour NiCad or continuous AC-powered operation Adjustable pulse tone levels Pitch changes with rise or fall in oxygen saturation Adjustable alarm levels for oxygen saturation and pulse rate Previous alarm settings are recalled from memory Output port for data communication to other instruments