You hang the lamps from the top of the Christmas tree and arrange the light branches on the Christmas tree as you wish. The lights are located on a delicate, invisible wire, powered by batteries. Number of LEDs: 40. 8 rows of 5 LEDs. Light color: cold white. LED spacing every 10 cm, 30 cm power cable, 8 lighting functions, length of the set 3 m, Timer 6h ON 18h OFF. Power supply 3 AA batteries (not included) , IP44, outdoor and indoor.