Solar PoweredThis solar-lighted doorplate plaque features with a built-in rechargeable environment-friendly battery. The Amorphous silicone light sensor solar panels has perfect capacity of solar power collection. Therefore, it can automatically charge itself in the day time and illuminates at dusk.IP44 Waterproof Suitable for OutdoorThe stainless steel holds up to the IP44 waterproof standard and provides complete protection from water,heat,frost, dust, oil, and other non-corrosive material.The sleek roof-liked also protect this plaque address form being damaged by water.It would be resistance to rainy days, windy days,snowy days and other weather condition.Long Working and Clear NumbersIlluminate 8-10 hours at night after 6 hours full charged during the day. 6 pcs SMD white LEDs, the latest energy management chip, 12 lumens. (Without direct sunlight, the lighting time will be reduced)Easy InstallationNo wiring is required and it comes with a built-in battery and two screws.It could be mounted on the wall, the mail box,fence,etc. Clicked the on/off button,use a screwdriver to fix the screws/nails (come in the packages)in the wooden stake/wall,then hang the address marker by putting the two slots in the back of the main units into the screws.