I have since spread (3 Units in about 70 sqm) in the garden, the parts, I have not a single hill more. The critters are not gone, but only go no longer in my garden. As in winter the solar panels were covered with snow and so the battery is empty, the hills were again the next day there. So the snow away and averted the modules with new snow and already was quiet again. My garden is Mole free!