3 Brightness Modes: Click the ON/OFF switch to switch between Dim (8 LEDs), Bright (20 LEDs), Super Bright (28 LEDs) LED) and OFF. 2 power supply modes: in addition to the USB cable, the parasol lights can also be powered by 4 AA batteries (not included). Dont worry about the power. Easy Installation: Cordless design with built-in automatic adjustable clamp, no tools required , just clip it on your parasol. Reliable Quality: Made of high quality and durable ABS material with 28 LEDs at energy saving. For direct lighting from the front down or for indirect lighting with the front face up. Enjoy your free time: when the sun goes down, you can resume your dinner, read your book and chat with your friends or family under our umbrellas. Whether on the beach, on the balcony or on the lawn. Product Easy to install. No need for extra tools, cables and power sources, easy to attach on the umbrella with the strong clamp built-in auto-adjust. Or you can hang it anywhere with the two bar-mounted hooks. For direct lighting from the front facing down or for indirect lighting with the front facing up. Widely used: Camping tents. Outdoor lighting. Beach BBQ Terrace in the patio.