2 power a units the b unit has a lionel 

fan drive smoke unit in it 

and all the on and of switches for the smoke units 

are on the back of the engines now !!!

soo you do not have to take them of the track 

to turn the smoke units on and of thats a great feature 

the engine are very very neatly panted silver leaf 

I did not like the brown and yellow color 

see all photos and video 

this set is custom !!

sold as is no returns