5 individual rooms. Each contains a light, all controlled with one button, and substrate heating system which are separately regulated. 6 vents in each enclosure. Each enclosure is 23"(w) x 23"(d) x 16"(h). Then entire tank is 27.5 x 27.5 x 88". This is including the heating unit activates one side and also the light button on the back. It is is exceptional condition. Perfect for showcasing your reptiles!