7072 Small Model Southern Pacific RR Animated & Lighted Sign by Miller Signs Suitable for N scale & HO scale, 1.8" wide x 2.2" tall, Limited Edition Sign 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 may also be lighted with a 4804 converter or 4803 or 4803 adapter will not work in DTN 002 base