Come and see our amazing products. Our fingertip oxygen accurately monitors measure O2 level, Pulse Rate, Perfusion Index and Pulse Strength in 8 seconds. Automatically powers on/off.Spot check and continuous measuring for optional. With analysis result of pulse rhythm displayed on the screen.When measuring, if O2 level value or pulse rate value exceeds the preset limit, the device will alert with beep automatically and the value which exceeds limit will flash on the screen.Suitable for sports and/or aviation. Pls confirm further with us if any query about packing info, inventory status and time schedule.