Radarcan R-132 User Manual page 8

Ultrasound consists of high-frequency sound waves which
are perceived by fleas and ticks, but inaudible to humans.
Human
Bat
Mosquito
Butterfly
Fly
Cockroach
Cricket
Dog
Grasshopper
Rodent
Dolphin
Mole
Others
The ultrasound wave are projected in all directions from the
FLEA | TICK REPELLER FOR PETS, thus protecting your pet.
Audible Ultrasound Table of
frequencies
within the
human hearing
range between
20 Hz y 20 Khz,
compared with
the approximate
hearing range
of different
animals and
insects.