Joomer 200 LED String Battery Christmas Lights (Blue) Ideal for Indoor and Outdoor Decor--The battery christmas lights illuminate during night, add warm and charming atmosphere to your garden, patio, lawn, porch, gate, yard, etc Battery Powered Christmas Lights-- 200 bright colorful LED lights on the 50ft light strand (0.98ft lead cable included), powered by 3 x D batteries (not included), high-brightness but not dazzling, low?voltage?power, non?plug-in. Timer Function-- Auto ON/OFF for all lighting modes, 6 hours "ON" and 18 hours "OFF" Easy to Operate & Install-- Easy operation with only one switch, 8 lighting modes Waterproof--IP65 waterproof rate for the lights string, and IP44 for the battery box, which is suitable for indoor & outdoor decorations