Constructed from durable A.B.S acrylic.4 x LED chips.Suitable marine lights ocean and road.Photocell activated: Day off, night on.On-off switch.NOTE: Batteries not included.Other Details: Part No. Dimensions (mm) Flash Colour Battery Type/Qty Operation Time Flash Rate Visibility Distance Weight(kg) 50294 129 x 48 White 4 x AA Cell (6V) 20 Days 1.5 Seconds 3km 0.11