The Microburst 3000 is powered by the LumeCel rechargeable energy system eliminating the need for alkaline battereies. It's completely self-powered by indoor lighting (both artificial and natural light) and guaranteed to run for at least 15 years. The need to purchase, store, replace and dispose of batteries is eliminated. Virtually maintenance free, reducing the potential of workplace mishaps or accidents. Color black; packed 6 per case.