USD$ 5.75 (Dropshippers can also enjoy wholesale prices.)
1. The string lights with tail plug can be connected with another strands, the first strand connects the power, then the second strand follows the first one with this tail plug, that's very convenient. The plug and controller are followed with the string lights.
2. About the waterproofness: The string lights can be used outdoor, but the controller and tail plug should be protected well, you can use the waterproof adhesive tape to firm them. If steep the controller and tail plug in the water, they will be damaged, but the string lights can be used in the rainy days, that's no problem.