3 brightness mode choices: Click the ON/OFF button to switch between Dim (indoor 8 LEDs), Bright (outdoor 20 LEDs), Super Bright (28 LEDs) and OFF modes. Multiple power supply possibilities: In addition to charging the light with an equipped USB cable, Eletorot parasols can also be powered by 4 AA batteries (not included). Don't worry about the power. Easy Installation: Cordless design with flexible, self-adjusting built-in clamp, no tools needed, just clip it onto your umbrella. Premium Lamp: Made of high quality and durable ABS material with 28 energy-saving LEDs. For direct lighting with the front face down or for indirect lighting with the front face up. Take away your free time: when the sunlight is out, you can continue your dinner with our umbrella, read your book, talk with your friends or play with your family, whether at the beach, on your balcony or in your swimming pool Beads Premium LED, high brightness, stable with excellent performance. 3 lighting modes, which meet your different brightness needs on different occasions. Suitable for camping, barbecues, playing cards or for sitting in the garden in the evening with family or friends, etc. Technical specifications: Material: ABS Light size: diameter 20*3.7cm LED number: 28 Lumens: MAX - 400lm high light / Min - 120lm high light Usage time: 18+ hours in bright light / 54+ hours in dim light Charge power: 5V-500mA