8981 Model Galaxy Drive In Animated Lighted Sign by Miller Signs Suitable for HO scale, S scale & O scale, 4.0" w x 2.75" t, Limited edition The sign comes with a circuit board and AAA battery box, simple to install on your structure on the curcuit board there is a on/off switch and a push button to change the sequence, has over 40 sequences on the curcuit board there is a on/off switch and a push button to change the sequence, has over 40 sequences