Now gehtŽs only with chip control

Thanks to this great invention, the uninvited guests stay out !! My 2 Fellnasen, Flea and Lilli, but took a few days until they got used to the "click" sound. Our cautious Cat in the Hat today, every time incomes: head in front, head back, head forward, head back .... until he finally comes in, it has already determined clicked 4-5 times. The batteries will last well so with us not so long as in the description (up to 6 months) promised. Within the last 2 months, I have been 4 or 5 times replaced the batteries! Even rechargeable batteries (2.400er) hold only up to 8-9 days.
With time comes as a pretty penny along ;-( But the main thing the foreign uncastrated !!! hangover can no longer purely !!