Features for Fingertip Pulse Oximeter: <br /><br />- Measure SpO2 and PR accurately<br />- Color OLED display SpO2 and PR、 Pulse waveform and bargraph display<br />- High brightness full color OLED can be used even in dark night<br />- Four viewing angles and six display modes<br />- Four levels adjustable brightness<br />- Low battery voltage indicator<br />- Automatic power off when signal is not available for 4 seconds<br />- 2 AAA batteries support 30 hours continuously<br />- Mini size、 light weight、 convenient to carry<br />- Widely used in hospital、 home healthcare、 oxygen bar、 community medical centre、 alpine area、 sports healthcare etc.