Why is there a squeal when use a phone watching the video camera close to the Mi Home security camera 360 ° 1080P?

Solution:

Because in the same environment Mi Home security camera 360 ° 1080P Microphone output pick up mobile phone voice repeatedly, feedback amplifying circuit, produce the noise, which belongs to the normal phenomenon, so open the Mi Home security camera 360 ° 1080P of the prison and open mobile control picture sound should be greater than 1m under the condition of the distance between can avoid the noise.