1. Use fixed frequency ultrasonic sound to deter nuisance barking. |
2. Use random frequency ultrasonic sound to drive many kinds of insects away. |
3. The ultrasonic sound is not harmful and can not be heard by human. |
4. The controller emits radio and received by receiver worn by dogs. |
5. The receiver determines the boundary range by the power of radio it received. |
6. The receiver emits static stimulation to warn the dogs. |
7. The closer to the boundary the stronger static stimulation goes with first tone warning. |
€70.56