... monitoring, and Waveform display 4. CE Certified Product DescriptionFeatures: 64k COLOR OLED Display, Four Direction adjustable SpO2 and pulse monitoring, and ... -250 bpm Accuracy: +/-2 bpm Resolution: 1bpm Display Mode: 64k COLOR OLED Display, Four Direction adjustable Battery type: Two common 1 ... 34x 31mm Net Weight: 25g(include batteries)CE Certified 64K color OLED screen Fingertip Pulse Oximeter