Lit, it glows with tiny pinpoints of light, like a starry sky. Unlit, its silvery surface reflects everything around it. Because it's cordless, you can put it anywhere: on a table, on a shelf, among plants or holiday greens. Takes 3 AA batteries. Specify Small (about 5" diameter) or Large (8" diameter). The more, the merrier. Also available in Red (HR9916), Green (HR9896), and Blue (HR9906). Sold separately.