1 This solar door plaque is equipped with a built-in rechargeable environmentally friendly battery. The light sensor solar panel has perfect solar energy collection ability. Therefore, it can automatically charge during the day and light up at dusk. 2 10 LED SMDs provide cool white light that is bright enough to make your address number more visible in the dark. It can help your visitors, emergency vehicles and package couriers find your house at night. 3 IP65 waterproof standard provides full protection against water, heat, frost, dust, oil and other corrosive substances. The smooth top style also protects this plaque address from water damage. It can withstand weather conditions such as rain, wind and snow. 4 It is equipped with 3 sets of numbers (0-9) and a set of letters, allowing you to DIY door panels according to your preferences. 5 No wiring, with built-in battery and two screws. Can be installed on walls, mailboxes, fences, etc. Click the on/off button, use a screwdriver to fix the screws/nails (included in the bag) to the stake/wall, and then insert the two slots on the back of the main body into the screws to hang the address mark.