Dog whistle 🐶 sine wave

Description of Dog whistle 🐶 sine wave

With this virtual whistle you can train your pet, thanks to the five types incorporating frequency.
You can generate from 7 kHz to 22 kHz in pure sine wave 5 sections.
You can train your dog to stop barking, or the neighbor's dog bothers you, you can use this utility to silence. You can modulate the signal with a 50Hz tone inaudible to make it more annoying.
Characteristics
* 5 types of frequency in individual buttons
* Internal pure sine wave generator
* Controller gain
* Optional 50Hz Modulation
Operation
Dogs and cats hear much higher frequencies than we do. The virtual whistle emits a high frequency tone that the dog can hear perfectly, so the dog pays attention immediately.
Humans can hear up to 14kHz, so do not panic if the dog can hear the whistle and you do not.
Note:
The quality depends on the dog whistle speakers in your device. It is possible that the speakers reproduce high frequencies wrong, and if you listen well, is actually hear a submultiple of the frequency. It can also be used in other pets like cats.