High quality, OEM provide , One year warranty , Fast delivery Function:1,Monitoring pulse, SpO2,PR(Pulse Rate).2,Displaying volume and column diagram of stroll.3, 4 directions, 8 display. Description:1,Display Method: Color OLED display, two display directions.2,The product is small in size, light in weight (total weight is about 50g including batteries) and convenient in carrying.3,Power ...