The racket is very robust, nothing to do with the first price you can find in supermarkets.
It is actually delivered with 2 1.5V batteries that take time
The effect is radical. It should not be sensitive because the mosquito "explodes" with great clatter related to electric arc
You find all the dry insect. There is more to put in the trash.
The effect is less radical on larger birds (wasps ...) but the need is especially mosquitoes and flies.
Make good use
Cyrille