EXF warm white solar Christmas lights are perfect for your celebrations outdoors or around your front yard, bring warmth to your home! An Ideal decor for our outdoor living With 2022 upgraded solar panel, the outdoor string lights will provide you a better experience of outdoor living. It is an ideal decor for the Christmas trees and fence and more. Energy Saving & IP65 Waterproof The solar LED string lights are powered by solar energy, this light will lights up automatically at night and off during the day, no utility energy costs. With its IP65 water resistance performance, it can work as usual even in rainy days when there is still power with the battery, no need to worry about short circuit due to moisture. 8 Lighting Modes & Memory Function Our solar Christmas lights outdoor waterproof have memory function and it will remember the last light setting mode and no need to press the ON/OFF button every day. You can press the button on the solar panel to select any lighting mode you like. 8 Brilliant Lighting Modes: Combination Waves Sequential Slow glow Chasing/flash Slow fade Twinkle/flash Steady-on Specifications: LED Color: Warm WhiteLED quantity: 100 LED * 4 = 400 LEDsSwitch: ON/OFF, MODE (8 Modes)Charging time: 6-8 hours & Working time: 8 -10 hoursString light Length: 33ft * 4 =132ftWire Length to first LED: 1.5m/4.9ftSpace Between LEDs: 10cm/0.32ftBattery: 800MAH Ni-MH rechargeable battery HOW to use it? Assemble the lights according to the IM;Remove the protective clear film on the solar panel;Cover the solar panel entirely and press the ON/OFF button, ensure it is at ON mode, then press MODE button to select your favorite lighting mode;Find a place you would like to decorate, make sure the solar panel can be exposed to efficient direct sunshine, meanwhile, this place will not have bright light source at night;Softten the earth with water and insert the ground spike into the earth;Adjust the solar panel and make it face upwardly, tighten the screw, it will turn on at night and turn off at dawn automatically. WHY it doesn't work? Please place the solar panel under direct sunshine to charge for one or 2 days and it should be able to turn on as usual.Check the solar panel is ON, cover the complete solar panel. If the lights come on, the button is in the on position.If the sun is not enough weather, or the temperature of the cold season, please charge more than a few days. Any questions please feel freely to ask us, we will help you solve problem quickly.