this application contain ultra sound from 15khz - 22khz
don't be scare because the sound will not hurt your ear. it's just for repel away the insect such as mosquito, etc
I just tried tested with mosquito.
for activated the program, you can press on - off button in the center then, press the frequency : 15-19khz for mosquito. if you want run the program at the background you can press home button, and press back button / search button to quit the application.
if there any bugs please let me know clearly, so I can replicate the problem, and make a solution.
this is a full version application not a demo, and it's free.
9Apps 4.9
