The pulse oximeter，based on all digital technology， is intended for noninvasive spot -check measurement of functional oxygen stautation of arterial hemoglobi(SpO2).Advanced DSP algorithm can reduce the influence of motion artifact and improve measurement accuracy of low perfusion.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%-20 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:Display OLED two color display SpO2 Measurement range: 70～99%Resolution: ±1%Accuracy: ±2% (70%～99%)， unspecified (<70%) Pulse rate Measurement range: 30～250 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 16 seconds Dimension & Weight 60 (L) × 35(W) × 32(H) mm50gPackage Content:1xRPO-8B7 Fingertip Oximeter1x Lanyard1x English user's manual