1 shows parameters are: blood oxygen saturation value, pulse frequency, pulse column
2. color display
3. AAA *2 batteries
4. Low voltage indicator
5. Automatic switch machine function
6.Four direction adjustable
7.display,more display modes
8.Two parameters:SPO2,pulse reate
9.SPO2 measurement range:70%-99%
10.colour ：Blue, Pink, Green, Gray, Purple
