Fly Repeller prevents you from getting annoyed by flies
Are you being annoyed by flies? There are everywhere. Just turn on Anti Fly, choose pitch, click start and enjoy your peacful time.
Anti Fly can be also used as Anti Mosquito (Mosquito Repeller). All in one application.
NOTE: If you can''t hear sound on 16kHz or 20kHz that is ok. This sounds is out of range to hear for many humans (especially 20kHz)