These 200 multi coloured led christmas lights from premier feature either a static or multi action setting amp are suitable for both indoor amp outdoor use a timer function means the lights can operate 6 hours on 18 hours off and there are 8 different display sequencesr these lights will add a warm colourful glow to any christmas displayr multi action led lights with static option battery operated 3 x aa not included for indoor and outdoor use overall length 20m brand premier