3 LIGHTING MODES: Press once for 8 LED lights(Dim), press twice for 20 LED lights(Bright), press three times for 28 LED lights (Super Bright - with 220 lumens output). You can always find the suitable brightness for you.^ 2 AVAILABLE POWER SOURCES: Built-in chargeable battery(3.8V, 2000mAh) and the attached USB cable can be used for charging, which free you away from replacing batteries. 4*AA batteries can also be installed for power supply (NOT INCLUDED).^ UNIVERSAL FIT: 7.87in diameter x 1.45in height; weighs 0.9 pounds, pole mounted fit pole size from 0.9in to 1.9in in diameter, so it's a great size for most standard market umbrellas, can be attached to an umbrella pole, camping tent, or outside on a hanging string.^ MULTIPLE APPLICATIONS: This patio umbrella light has lots of usages; Can be used as patio umbrella light, camping tent light, temporary emergency light. Perfect for BBQ, eating outside, playing cards, or lying on your leisure chair in the evening with your families or friends.^ EASY TO USE: Light casing is made from durable ABS material that is rated for outdoor use and easy to maintain; Cordless design with built-in flexible auto adjustable clamp, no tools required, simply separate the two halves of the light, place the light on the umbrella pole, and push it back together.^