3 Brightness Modes to Choose From: Click the ON/OFF button to switch between Dim (inside 8 LEDs), Bright (outside 20 LEDs), Super Bright (28 LEDs) and OFF modes. < p>Multiple Power Supply Ways: Besides charging the light with an equipped USB cable, the patio umbrellas can also be powered by 4 AA batteries (not included). Don't worry about the power. Easy Installation: Cordless design with flexible built-in clamp, auto adjustable, no tools required, just attach it to your patio umbrella. Premium Quality Lamp: Made of high quality and durable ABS material with 28 energy-saving LEDs. For direct lighting, place the front down or for indirect lighting, place the front up. Take your time: When the sunlight is out, you can continue your dinner with our umbrella, read your book, chat with your friends or play with your family, whether on the beach, on your balcony or in your swimming pool