Dog Whistle

This utility is a dog training and a dog repellent whistle in same time. Also you can use it with other animals like cats, birds, etc.Most pets can hear a much higher frequency than humans. As the frequency of a sound is higher it will draw more attention. Due to the limitation of phone devices we have picked a few frequencies that should work on most phones.TRAINING INSTRUCTIONS:
- Pick a frequency for positive response. Then use it the times when your pet does something right. We suggest a low frequency because they are more pleasant for pets ears.
- Pick a higher frequency for wrong response. Use it at times when your pet does something wrong. 
- You may also pick a frequency to call your pet. Use highest frequency since higher frequencies reach further.positive response 12000Hz, short sound,
wrong response 15000Hz, short sound
call 18000Hz, about 1sec.REPELLENT INSTRUCTIONS:
When using this application as a repellent use the highest frequency. Hold button for at least 2-3sec. 
18000Hz or 20000Hz as necessary. Most people are unable to hear sounds higher then 16000Hz. Older people even can