Certain Twinkly products can be used outdoors or in a sheltered area.
Other can only be used indoors, away from atmospheric agents and drastic changes in temperature/humidity.
Check the icon that describes type of use supported on the website or your Twinkly product pack:
[Indoor icon] – Product for indoor use only
[Outdoor icon] – Product for indoor and outdoor use (*)
[Patio icon] – Product for outdoor use, sheltered from rain and snow.