The OLED Finger Pulse Oximeter SM-1110 ticks all the right boxes in terms of establishing itself as one of the premiere home pulses currently available in the market. It has a myriad of features that help users monitor oxygen levels in their bloodstream. Using sophisticated signal processing methods, this pulse oximeter ensures that readings are always accurate. With two AAA alkaline batteries to depend on for power, the unit can work for as long as 30 hours.