Specification for Fingertip Pulse Oximeter:Display: 1.1 inches OLED two color displaySpO2 measurement range: 70゛99%Resolution: ＼1%Accuracy: ＼2% (70%゛99%)、 unspecified (<70%)Pulse rate measurement range: 30゛240 bpmResolution: ＼1%Accuracy: ＼2bpm or ＼2% (select larger) Low Perfusion ＋0.4%Power: 1.5V (AAA size) alkaline battery x 2( NO Included)Supply voltage: 2.6~3.6VWorking current: ＋30mAAutomatic power-off: Automatically power off when no signal in the oximeter for more than 8 secondsDimension & Weight: 130 (L) ～ 100(W) ～60(H) mm、 65g(without batteries)Optional Color: Pink、 Blue、 Light Purple、 Green、 GrayFeatures for Fingertip Pulse Oximeter: - Reliable accuracy and durability- Two Color OLED Display、 four display modes.- 4-Direction Display adjustable.- Low voltage indicator、 Real-time spot-checks.- Low power consumption、50 hours continuous to work.- Low Perfusion ＋0.4%- Automatic power off when no signal- Small and light weight、 convenient to carry- Widely used in hospital、 home healthcare、 oxygen bar、 community medical centre、 alpine area、 sports healthcare etc.Package Content:- 1 x RPO-8A Fingertip Oximeter- 1 x Lanyard- 1 x English user's manual