Specifications: The irrigation controller is easy to use. Begin with 3 stations, then expand the controller to 6,9 or 12 stations using our 3-station plug-in modules. The need to stock different sized controllers for varying jobs is eliminated. Features: 1). Expandable modular design-3,6,9 or 12 stations. 2). Controller face can be easily removed from housing. 3). Three programs(a/b/c)each with four start times. 4). Choice of independent day options. 5). Global water budget/seasonal adjustment. 6). Memory back-up. 7). Surge protection. 8). Water budgeting. Dimensions: Indoor model:8.3(h)x9.6(w)x3.7(d) in Outdoor model:8.9(h)x9.9(w)x4.3(d) Operating specifications: 1). Outdoor models,115vac transformer with internal junction box. 2). Indoor model,115vac three prong plug-in transformer. 3). Station output:24vac 4). Transformer output:24vac 1.25amps. 5). Operating temperature:0-150 degrees f.