The product will have the following periodic effects on the birds and the area
* Incubation period: It starts to have an effect, and the sensitivity of the bird is reduced, please continue to use it.
The number of birds is gradually decreasing, and the sound of bird calls is weakened.
* Effective period: Continue to interfere, the auditory system is stimulated, and gradually reduce the approach frequency. Regularly send sentries back to check, but the number is not large, when staying Not long.
* Stable period: continue to create an uncomfortable environment to prevent birds from migrating back to roost, please use it for a long time use.
At this time, an invisible ultrasonic protective net has been formed, and the birds no longer grow stay within this range.
