You install the light, you can just leave it alone. It absorbs sunshine at daytime and auto flashes in darkness. No switch means the light is fully sealed, no water can slip in because of the high density, ensure the long lifespan. waterproof level and corrosion resistance prolong the lifespan of flashing light, don't have to replace the light frequently. The light can get wet in the rain but it can't be soak in the water. Specifications Quantity 1Pcs Colour Orange Warranty Period: Not Applicable Item Condition: New Model: waningled Country of Origin: China Package Quantity: 1.