The mole repeller is powered by highly efficient solar panels that allow sunlight to charge through the built-in solar panel. Since it is solar powered, it is absolutely no charging costs. Energy efficient and environmentally friendly mole detterrent. When you first use vole repellent outdoor, you are better to put it in the sun for two days to fully charge. This solar powered chipmunk repeller will never contaminate your garden and is harmless to plants, crops, people and pets. The snake repellent for yard is made of high quality ABS and PC, designed with waterproof materials. It can be used with peace of mind even in bad weather such as rainy days. Choose the best location for sunlight exposure and wipe it regularly with a damp cloth.