Dependable Oxygen level and pulse rate measurements for your daily needs.Simple operation, small & lightweight design, portableLow power consumptionDisplay SpO2, SpO2 waveform, PR, Pulse bar2 AAA alkaline batteriesLow battery indication6 Mode and 4 DirectionsAccommodates widest range of finger sizes from pediatric to adultSoft silicone padding, strong clipResistant clip, non-invasive, no picking