Special design for children
Comfortable for wearing
Low power and finger-out alarm
Rechargable button lithium battery 3.6 V DC ~ 4.2V DC.
Automatic power-off when finger is not detected
SpO2 value display
Pulse rate value display，bar graph display
Low-power indication: low-power indication symbol appears
before working abnormally which is due to low-power.
Pulse sound indication
With alarm function
Measurement of SpO2
Measuring range: 0%～100％
Accuracy: 70%～100％：±2％；Below 70% ：unspecified.
Measurement of pulse rate
Accuracy: ±2 bpm or ±2% (select larger)