SOLAR POWER LIGHTS: No battery or wire required, charged by sunlight for 6~8 hours, can work up to 10 hours or more. The solar string lights must absorb enough sunlight directly to work. If not, it doesn't work well. So make sure the battery is fully charged before use.^AUTO ON OR OFF: The built-in rechargeable Ni-MH battery automatically turns off during the day to absorb sunlight and turns on automatically at dusk. Leave the light on when it is outdoors, otherwise it will not absorb sunlight to charge.^FLEXIBLE & WATERPROOF: Made of thin and flexible copper wire, it can be easily bent into any shape you want. The 120 LED Christmas lights and solar panel are IP44 waterproof so it can be used both indoors and outdoors.^SUITABLE FOR ALL DECORATION: These wonderful outdoor string lights glow at night, adding colorful and charming atmosphere to your garden, balcony, wedding, party, bedroom, etc. Ideal for Christmas, Easter and other events and holidays.^