BY USB Rechargeable The umbrella light has built-in rechargeable batteries, which can be recharged use, without changing the battery, which is more energy-saving. And with USB data cable, which is more convenient to charge power supply, computer or wall mounted charger. Upgraded 28LED Umbrella Light This patio umbrella light is composed of 28 high-brightness LED lamp beads; it supports brightness adjustment and is an excellent helper for outdoor activities at night. 2 Brightness Modes The 8 and 28 lamp beads of the patio light can be selected freely according to different environmental needs. Up to 400 lumens when all 28 high-brightness lamp beads are on. Light up your night. Long Working Times Umbrella lights can be fully charged in 8 hours. High-brightness (28 lamp beads) can be bright for 18 hours when fully charged; low-brightness (8 lamp beads) can be bright for 54 hours. Accompany you through a romantic night life Easy to Installation +Widely Use Patio umbrella lights can be adjusted freely according to the size of the umbrella handle, easy to operate and directly installed; suitable for 2-5cm umbrella handle.Perfect for outdoor use, camping tents, card games or chatting with family or friends in the yard. Specifications Umbrella light Size: 20*20*3cm LED number: 28 LED lifetime: 50,000 hours Lumen: MAX 400lm at high light / Min 120lm at dim light Charging time: 8h(with plug in) Packaging 1*28LED umbrella light