3 Brightness Modes: Press once for 4 LED lights (low intensity), press twice for 20 indicator lights (Bright), press three times for four indicator lights (Super Bright). Meet your needs of different brightness on different occasions. Power source available: 1, requires 4 x AA batteries (NOT INCLUDED). A battery set lasts approximately 10 hours (24 LEDs) to 24 hours (4 LEDs), depending on the battery you have used. 2, USB powered, can be powered by external power source such as: power supply, etc. The lifespan of LED light is more than 50,000 hours. Energy saving and brilliant: with 24 LED bulbs energy saving, energy saving and environmental friendly. 3 brightness modes, meet your different brightness needs in different occasions. Convenient: no need for additional tools, easy to attach to your umbrella with the powerful automatic adjustable clamp, also can be hung anywhere using its two hooks, mounted on pole, adapt to the size of -4.5cm). Widely Application: Suitable for camping, barbecues, card games or lying down on your leisure chair in the evening with family or friends. Mounted face down for direct lighting or face up for indirect lighting.