Application: This product is ideal for DIY decorating sandboxes, miniature cities, miniature towns, railway stations, roads and other miniature landscapes to brighten up your model yard or streetscape. Size:Suitable for HO scale and OO scale 1:100 , street light models actual size is -6.7x1cm/2.63x0.39in. LED lamp parameters: The LED beads are rated at 3V, the colour of the beads is white.（Not to exceed 3V when connected to a separate power supply） LED Control panel parameters: Traffic light interval-5s ,Control panel+LED lamp rated at 6V Connecting the wires:+ - Power supply connected at both ends, red, green and yellow wires on the signal lamp connected to each of the three blue wires (R/Y/G)on the controller.