1. 3-level brightness modes for umbrella LED light. You can turn on 4， 24 or 28 LEDs to set your own brightness for different occasions^2. Self-adjusting clamps fit most patio umbrellas with a 1/4-inch rod， two hook design make the light easy to hang or carry， put on the ground， in your tent， or just for fun hang from a tree， no tools required.^3. Cordless design with built-in flexible self-adjustable clamp， easy to clip to your sun visor， fits most patio parasols Used as umbrella lighting， camping tent lighting， temporary emergency lighting.^4. Requires 4 AA batteries (not included).^