These ice white string lights with 500 leds add an elegant note to any indoor or outdoor space particularly at night the glittering bright leds add a charming sense of wonder to your garden or home r r the battery can last up to 30 days if used on the on going timer function switching them on for 6 hours and off for 18 hours in addition to this they have 8 different function settings from onofftwinklefade etcr r 2 x c batteries required not includedr timer 6 hours on18 hours o