Karlling Battery Operated Multi-Color 20 LED Stars Fairy Light String Xmas Party Decoration Defect rate less than 0.25%,If you receive the defect item.please contact us(Click The seller Name from your order detail page,Then Ask A Question) instead of Amazon for solution.Please keep way from the bad battery. High brightness and low consumption,Long service lifetime;With control switch to adjust the switch and flashing String length: Approx. 2.1m;LED Quantity: 20;LED space: 10cm Powered by 3 x AA battery and 3 Only( not included ),Will Not Hurt you at all. Karlling 20 LED battery string light;Color: Multi-Color