The Premier 400 Timelights Christmas lights are battery operated and multi-coloured. They use superbright, energy-efficient LEDs that are long lasting and durable. The lights come with an 8-setting multi-action controller and a built-in 6 hours on/18 hours off timer. They require 3 x C batteries, which are not included. The lights are also available in white and warm white. The 39.9m lit length makes them suitable for a variety of indoor and outdoor uses. They offer up to 30 days of battery life from 3 x C batteries.