MORE DETAILS * 250 Lumens, 20 super bright LED, 3000K warm white light, 2.8W, DC 4.5V, LED lifespan is 30,000 Hours. * Powered by 6pcs AA batteries (not included) and the battery run time is 50 hours. * The remote control can operate the patio umbrela lights within 20ft with no obstacles block the signal. * The remote uses Infra Red technology. Replace with a CR2032 battery if the battery in the remote runs out. *Point the remote at the lights for the best operation. * Physical objects between the remote and the lights may interfere with the Infra Red signal. Installation (1) Press the quick release button to separate the light. (2) Place the light around the pole and re-connect the light. Make sure it clicks closed firmly. If cut off the rubber sleeve in the middle of the umbrella light hole , the diameter of the single side is 49mm and the diameter of both sides is 53mm. Notice --Umbrella & Batteries are NOT included. --Please don't get water inside the umbrella light when using it. --Please pull out the battery insulation sheet of the remote before using the remote the first time. Packing List - 1 x Patio Umbrella Light - 1 x RF Remote Control - 1 x User Manual