Description
1. Ultrasound has a certain range of action, generally within 50 feet without obstruction, and there will be different effective distances according to different frequencies
2. Everyone’s hearing range is slightly different, if you hear the sound, try to lower the frequency
3. When the red light is on, it is in normal working condition and can be tested on the dog
4. Ultrasound will be greatly weakened when passing through the wall. In order to ensure the effect, it is recommended that the space is unobstructed and placed in a place where the dog often stays.
5. It is normal for dogs to bark when the device is turned on. It will cause strong stimulation to some dogs at the beginning. This is also a manifestation of the work effect. If you use it several times, the dog will reduce the frequency of barking.
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