Features for Pulse Oximeter: - Color OLED display， simultaneous display for testing value and plethysmogram. - The display interface of OLED can rotate four directions whith six different display modes after pressing the power button for less than 0.5s.- Real-time spot-checks - Pulse waveform & bargraph display - Advanced setting for alarm - Functions of audio alarm and pulse sound - Automatic power off - Low power consumption down to 0.3%- 50 hours continuous to work - Low perfusion ≤0.4% - Low voltage indicator - Widely used in hospital， home healthcare， oxygen bar， community medical centre， alpine area， sports healthcare etc. Specification for Pulse Oximeter: Specification:Display OLED two color display SpO2 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% Power1.5V (AAA size) alkaline battery x 2Supply voltage: 2.6~3.6V Working current ≤30mA Automatic power-off Automatically power off when no signal in the oximeter for more than 8 seconds Dimension & Weight 58 (L) × 31(W) × 29(H) mm60gPackage Content: - 1 x RPO-8B3 Fingertip Oximeter- 1 x Lanyard- 1 x English user's manual