Other details:User friendly, All functions accessible through seven button keypadBright LEDs indicate important functions and settingsLCD display for plethysmograph and HR valuesLight weight and portable monitor48 hours of graphical trends for peripheral capillary oxygen saturation and HR valuesPitch tone variations in HR sound for different peripheral capillary oxygen saturation valuesSelectable alarms for patient specific setup, with volume controlDC jack for charging during transportationReal time clock , Adjustable LCD back light Intensity Control, Alarm Mute for patient complianceBuilt-in rechargeable Li-ion battery