Product Description Suitable only for Paediatric and Neonate Rechargeable button lithium battery with charger Beep pulse sound, Low power and Finger out alarm Automatic power—off when finger is not detected Technical Features: SPO2 Measurement range : 30~99% Accuracy: ±1% for 70-99% Unspecified for 0~69% Alarm Range: 0-100% Pulse Rate Range : 30-255 Bpm Accuracy : ±1% or ±1 Bpm (Select Larger