They claim it's completely safe, but save your money, these are less effective than the ultrasonics, which only work short term if at all.
No-sorry.
I can answer this easily with a resounding NO!!!! I had an aunt that invested in this type of pest control for fleas and mice and it simply did not work.
John Cator was born in 1728.
Rhonda Cator was born in 1966.
John Cator died in 1806.
Silvio Cator was born in 1900.
Silvio Cator died in 1952.
Geoffrey Edmund Cator was born in 1884.
Geoffrey Edmund Cator died in 1973.
Albemarle Cator died on 1932-11-18.
Albemarle Cator was born on 1877-04-12.