Unfortunately, it’s really just a bit of rubber and plastic. It wasn’t even looked at. Since my cat doesn’t care for catnip, it’s no use either. It doesn’t vibrate, just sits there. It’s a bit of a brush, nothing more. It’s too expensive for what it is.
I'm shocked that this thing is still even on the market. I bought it for my cat years ago and she completely ignored it. Not even the catnip worked on her.