How can I make sure the baby monitor BM08 can detect the breathing and heart rate?

1. Aim the device toward the baby's chest and abdomen area, not only toward the head or the edge of the crib.

2. Avoid thick covers, metal objects, large reflective surfaces, or moving objects between the device and the baby.

3. If the baby is not visible in the video but the device still shows data, first check whether the baby is still in front of or near the effective sensing area.

4. If the baby has clearly left the crib or moved outside the sensing area but readings continue, reposition the device and observe whether the readings stabilize.

5. If readings frequently drop out, look abnormal, or do not match the actual situation, check the device angle, distance, obstruction, and environmental interference.