“pulse rate in seconds”?
Don’t medical personnel want it in minutes?
X heartbeats in minutes?
In “seconds” you will have an LED readout of O2 saturation in % and heart rate in beats per minute.
These things can be really handy when doing activities (treadmill/walking/run) to know what your tolerances are.
Wish it had the rhythm strip so you could see each complex. Other than that, good price.