Paradise by Sterno Home Solar Cast Aluminum LED Post Cap Light for 4x4 Wood Posts, Bronze (Crystalline Solar Panel, COMPATIBLE - Fits on any standard 4"x4" post CRYSTALLINE PANEL - More efficient than amorphous solar panels, charges faster and lasts longer LIGHT SENSOR - Turn ON at dusk and OFF at dawn automatically everyday with the photocell technology WEATHERPROOF - Protective hammered glass lens and durable bronze finish cast aluminum body INCLUDED: 1 x Post cap light; 1 x AA Ni-MH rechargeable battery; 1 x User Manual.