We live right next to a big expanse of bush with fresh water all year round close by—lots of tiger snakes and dugites. Everyone on our street has a lot of snake visitors according to my friend 100m down the road. One even in a lady’s kitchen, lots in gardens. He knows everyone on our street and the snakes are prevalent. Yet for 2 years now we haven’t had any snakes here. The beep is very loud but we have them positioned for least sound in the house and away from the neighbours fences. I would rather the beep than the snakes! Also one was faulty and I was immediately sent a replacement. No trouble since. I have them running 3 seasons a year on a single set of batteries. Thank you so much! Great product, great service.