8 Modes Christmas Lights: The Multicolor Christmas fairy lights plug in features 8 lighting modes: Combination, In waves, Sequential, Slow Glow, Chasing/Flash, Slow fade, Twinkle/Flash, Steady on. Just press the button on the adapter to set up your mode to fit your Christmas party decor. Timer & Memory Function: Outdoor Christmas lights mains powered feature a timer function(6hrs on/18hrs off). Press the round button on the adapter to set up the timer(quickly double-press until green lights on, timer activated). In addition, with a built-in memory chip, which can save your last lighting modes, no need to reset every day. Widely Application: UKCA certified, safe to use, these LED Christmas string lights are perfect for indoor and outdoor, easy to install and look great! Brighten up any occasion widely including Halloween, Christmas, wedding, thanksgiving day, garden, home, bedroom, wall, porch, fence, party, cafe, bars etc. End-to-End Connectable: Per strand Christmas tree lights 20m/66ft length with 200 LED, features male and female safe plug, easy end to end connections, allows to connect up to a maximum of 3 strands(maximum 600 LED 69m). Waterproof Christmas Decorations: The Christmas fairy lights outside can withstand all kinds of weather. Waterproof designed string lights perfect for indoor and outdoor decorations. Please note that the adapter is not waterproof, please kindly protect the power adapter from the water!