Our plug-in transformers provide a safe and convenient power source for any dollhouse or miniature room. All Cir-Kit Concepts' transformers are designed to plug directly into a powered outlet, thus eliminating the need of building a special transformer enclosure within the dollhouse. Input: 120 vac 60 hz 17 watts. Output: 12 vac 10 watts. Up to 16, 60ma 12v GOW bulbs. Or 23, 40ma 16 GOW bulbs. Or 5, 20 ma spotlights or bright fluorettes. Dimensions, inches: 2W x 2 1/2H x 2D. 1in to 1ft. 1:12 Scale. This is sized for a dollhouse. Detailed scale model for adult collectors. Not intended for children under 14.