High frequency sound simulator

Tried it out and it's making noise but that's all I know at the moment. It doesn't seem to effect the cockroaches so I'm gonna try a different frequency. Trying 16000. Update - tried several frequency. Does not work. Uninstalled.

The app makes what it says ' But I'm not an expert about any of this .It needs to express how to work it .I didn't know you could lock it . An instruction or two would be a lot of help .Otherwise having to press for the sounds to make removed my interest thinking that's the only way this works and That I had to guess .

Since installation, this app kept rats, mice and cockroach away from our home!!! I recommend this app and rate it 5 stars!!! Try the 1600 khz . . of this fascinating software by DMITSOFT. To lock, simply press the select setting (1600 hz) and the icon found at the bottom right of the display at the same time. Enjoy guys!!