No transformers They plug right into 110VAC receptacle

The other set doesnt appear to be guaranteed at all.. These have plug at both ends for more decorating versatility you can plug additional sets onto the end of the string, rather than having to start each one at an outlet like other LED Christmas sets would have you do. Compatible with your existing miniature Christmas light sets. Sets can be ordered in any solid color, including white and blue. A multicolor set is available which includes blue, something not found in other LED light sets.

They plug right into 110VAC receptacle with an ordinary fused Christmas light plug. Endtoend connectivity. The other set doesnt appear to be guaranteed at all.. These have plug at both ends for more decorating versatility you can plug additional sets onto the end of the string, rather than having to start each one at an outlet like other LED Christmas sets would have you do. Compatible with your existing miniature Christmas light sets. Sets can be ordered in any solid color, including white and blue. A multicolor set is available which includes blue, something not found in other LED light sets.