5 specific rooms. Each has a light, all regulated with one button, and substrate heating system which are separately regulated. 6 vents in each room. Each room is 23"(w) x 23"(d) x 16"(h). Whole storage tank is 27.5 x 27.5 x 88". This is consisting of the heating unit changes on one side and also the light turn on the back. It is is excellent problem. Perfect for showcasing your reptiles!