Bought 4 CatFree units for our garden, to keep our cats in..they do the job well when they are working - which is unfortunately not much of the time. Put in good quality batteries, and they still just stop working. I have sent all 4 units back, 2 of them for a second time. Sent them all back again and asked for a refund under the Consumers Guarantee Act only to receive 4 units back and only 1 being a new replacement. I'm seriously out of pocket (over $350). Poor service and unwilling to refund, even though they have an obligation to do so. Not happy.