We like cats, but not their shit in our garden, so we bought the Katz distributor because the neighbor cats our garden constantly abused as a toilet, everywhere was cat crap, so we can until now recommend these ultrasound cats distributor, until now we had to God Thanks not once more cat feces in the garden, so we are grateful because we will certainly need the 400, the last 3 -4 years old - spent (Pepper, Kate sprays, Cats ultrasonic distributor, etc.).