Features for Pulse Oximeter: <br /><br />- Measure SpO2 and PR accurately<br />- LED display for SpO2 value and PR value、 bargraph display<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. Measure SpO2 and PR accurately