How it works and why it works.

There's three options you can choose from:

Dragonfly - mosquitoes have only a few natural enemies. One of those is dragonfly. When dragonfly wing's sound appears in the air female mosquitoes prefer not to shine and do some chores around the house, vacuum, do the dishes...

Bat - another mosquito's enemy and our friend. Batman's prototypes use an ultrasound with a frequency 50-90 kHz for navigation instead of GPS as we are. Mosquitoes hear that bat sees them and packing up their luggage.

Mosquito - pretending that we're a male mosquito and peeping with a frequency 12,3 kHz. Exactly this sound male mosquitoes produce to attract non-pregnant female species. After successful copulation this sound drives women crazy like in real life. It is well known fact that only pregnant mosquitoes drink blood. So they think that your phone is a huge male with whom they don't really want to meet again.

A little bit complicated but it works!

Try it!!!.