The light string is kept simple, but stable for the casual and careful use. Bare copper wire with LED. The chain itself is certainly good for outdoor use. However, already says the instructions provided (in moderate translation) that the tab of the chain must be protected from moisture. By design of the plug, the plug Doese is not closed properly, so that moisture can get both in the outer socket and the plug. Only when plug and socket can be protected from moisture, sense. For the real outdoor use the light string is not suitable - for this reason 3 points deduction,
