Indoor/outdoor: They can be used indoor or outdoors. Bring the party anywhere! Two options: Choose from 'Happy Birthday' or 'Merry Christmas'. Perfect for adding a personal element to your celebrations! Batteries: 3 x AA batteries (not included). Colourful: Add a burst of colour to your gatherings! These lights create a happy and fun atmosphere, brightening up your party. Material: 100% PC. String lights: Get these celebratory string lights! | Merry Christmas Happy Birthday String Lights | Wowcher