Features: High-definition TFT display screen, clear to view. Small and lightweight, simple one-click measurement. Detect the blood oxygen and pulse rate quickly and accurately, with abnormal alarm. Silicone finger mold, comfortable to wear. Suitable for all ages, it is portable for home and travel. OLED display: simultaneous display for testing value and plethysmography Description: 1.Finger Pulse Oximeter is an economical and accurate way to detect pulse rate and oxygen saturation through your fingers. It is suitable for testing blood oxygen saturation and pulse rate in hospitals, homes, schools and medical centers.