1. SPO2, Pulse Rate and perfusion indicator                        

2. Colourful display four display directions and two styles waveform (Plethysmogram and line)

3. Accuracy: ±1%                         

4. Power off automatically without finger                        

5. Convenient AAA size alkaline or rechargeable batteries"                         

6. Low voltage indicator                           

7. Pulse sound and alarm funciton are availble