Ключевые слова: cardiovascular exercise, device screen, digital, digital display, electrical equipment, electrocardiography, electronics industry, equipment, examining, finger, hand, health monitoring, healthcare and medicine, heartbeat, human body part, human finger, human hand, illness, infectious disease, instrument of measurement, measuring, medical equipment, medical exam, medical instrument, medical oxygen equipment, medical scanner, medical test, medical test results, medicine, monitoring, oxygen, person, portability, portable information device, pulse oximeter, saturation, taking pulse, unrecognizable person,