Professional Finger Pulse Oximeter Berrcom Pulse Oximeter Accurate Measurement of Blood Oxygen Saturation - Excellent performance: Uses photoelectric detection principles to accurately detect blood oxygen signals, with a measurement accuracy of +/- 2% - Hardware update: Uses advanced algorithms and a sophisticated chip to provide accurate SpO2 and pulse readings in just 8 seconds. Silicone shading design to avoid interference - Easy handling: One-button measurement, results on digital LED screen. Automatic shutdown after 30 seconds - Tips: Check the battery direction, make sure the red light is on before measuring, distinguish between SpO2 and pulse readings - Wide audience: Designed to be portable and used in children, adults, elderly, pregnant women, etc. Easy measurement after physical activities