Information about BPL Smart Oxy Pulse Oximeter with Perfusion Index Black BPL Smart Oxy Pulse Oximeter with Perfusion Index is used to check pulse rate and oxygen concentration in the blood. The device facilitates colored LED screen and auto shut off feature after 8 seconds. Uses: It is used to check pulse rate and oxygen level in the blood Product Specifications and Features: Accuracy: tracks the oxygen concentration in the blood with a minimum deviation of +/-2% and measures the pulse rate with a minimum deviation of +/-2 bpm