LEDNICEKER Blue Colored Solar LED Lights String, for Garden, Patio, Christmas Tree, Parties and All Outdoor and Indoor Activities(4.8m 15.75ft 20 Bright LED Bulbs, Blue Waterdrop Modeling) Solar powered 15.75ft long water drop modeling fairy lights string for gardens, patio, lawn, yard, porch, camper and all indoor and outdoor activities The solar panel charges the battery during the day by converting solar energy and the sensor will turn on the lights automatically at night The charging can only be finished under ON mode, please switch on the string lights by pressing ON button at the back of the solar panel before charging the lights The lighting performance was decided by the volume of solar energy converted and stored, it may vary with the intensity of sunlight, geographic locations, weather conditions and shift of seasons There are 2 modes to choose from, the lights can stay on steadily or blinking at once by your favor