Product Description Note: This patio umbrella light could be recharged by a laptop power adapter, it takes about 8 hours. The light will be on for 18-54 hours, but the limited charging power is 5V 500mA. Only provide a paired USB charging cable, the adapter and battery are not included. The umbrella is not waterproof. Package Contents: 1 * 28LED Umbrella Light 1 * USB Charging Cable 1 * Manual Eletorot 28 LED Patio Umbrella Light Practical yet powerful enough to gently illuminate outdoor gatherings after dark. Premium LED beads, high brightness, stable with excellent performance. 3 lighting modes, which meet your different brightness needs on different occasions. Suitable for camping, BBQ, playing cards or 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 brightness Usage Time: More than 18 hours in bright light / More than 54 hours in dim light Charging Power: 5V-500mA Adjustable clamp Pole mount with pole size (0.9inch to 1.9inch) in diameter Fits most umbrellas. Two-way Always ready to light with 4 AA batteries (not included) The included USB cable can be charged with AC adapter, computer, power bank, etc. with multiple charging modes. 3-level brightness Dim light with 8 LEDs on Intense light with 20 LEDs on Super bright light with 28 LEDs on