LED Icicle Lights Christmas Tree DecorationsExtendable It is designed with a male and female plug that can connect more than 2 lights together using one transformer for wider application. There is a clear connector at the start of the string lights that can be used to attach another cord of lights, which is more convenient to use. Safety insuranceThe fairy lights are authoritative UL certified and adopt a 30V low voltage plug, which is lower than human body safe voltage, definitely no risk of