John Bunn DigiO2 Finger Pulse Oximeter Dental Priming Volume: 8 STCSFP10GBX40DS Priming Volume: 8 Simple to clean surfaces with limited crevicesTrim and lightweight for easy moving and handlingTotal weight of only 14 · Large LED color display that allows for easy to see day or night use· Simple one button operation· Automatic power on off function (shuts off after 8 seconds of non operation to conserve batteries)· Display: Oxygen saturation (SpO2) Low Pulse RatePre set Alarm Limits: Low SpO2 90%Low Pulse Rate 50bpmHigh Pulse Rate 120bpm · Resistance to surrounding light: The difference between the values measured in the condition of indoor natural light and that of a darkroom is less than ± 1%