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. Our DC output transformers are a marked improvement over our prior AC models. They provide a steady 12 volt output, whereas the AC style had a higher output voltage with light loads and a lower voltage at heavy loads. The higher voltage was hard on bulbs and the lower voltage resulted in dimmer lights. The DC transformers are completely solid state allowing a constant 12 volts at all load levels. They also have many safety features including short circuit and current overload protection. They are virtually burn-out proof. Output: 12 vac 20 watts. Up to 64, 60ma 12v GOW bulbs. Or 100, 40ma 16 GOW bulbs. Or 20, 20 ma spotlights/bright fluorettes. This is sized for a dollhouse. Detailed scale model for adult collectors. Not intended for children under 14.