Features for Fingertip Pulse Oximeter:- Measure SpO2 and PR accurately- LED display for SpO2 value and PR value， bargraph display- Low battery voltage indicator- Automatic power off when signal is not available for 4 seconds- 2 AAA batteries support 30 hours continuously- Mini size， light weight， convenient to carry- Widely used in hospital， home healthcare， oxygen bar， community medical centre， alpine area， sports healthcare etc. Measure SpO2 and PR accuratelyPackage Content- 1 x RPO-50L Fingertip Oximeter - 1 x Lanyard- 1 x English user's manual- 1 x PouchNote: We will not include batteries， according to China law， batteries are not allowed for international air transportation.