runs off power or car . led lights so low power consumption. sign is about 1m long so not small . lights are bright. ideal outside a open home in a car back window. lights stay on or you can have them flashing. auction is for 1 but i have 2 for sale . ok to view first if unsure . ideal for real estate agent . used overseas in a house window where there are more than one house down a driveway . brand new item . pick up coatesville