Wikipedia
Altéo
RATP Class Z 1500 "Altéo" is a type of double-decker, dual-voltage electric multiple units operated on the French RER A line. These trains have been built by GEC Alstom and ANF. The Altéo is also known as the RATP version of the MI 2N.
RATP Altéo looks very similar to SNCF Class Z 22500 trains, but many differences exist between these models, such as motorization and design of inner spaces.