pulse oximetre 1:Small and lightweight 2:Monochrome digital LCD display 3Automatic power-off after finger out pulse oximetre Model Number:DPO041Features1:Small and lightweight, very convenient to carry and use2:Monochrome digital LCD display3:Accurate measurement of SpO2 & PR (Pulse rate)4:Real time pulse bar display5:Automatic power-off after finger out6:2 x AAA alkaline batteries power supply ...