B.Y SELF Solar Fairy Light String 20 Lantern Ball Light for Christmas Decorative Gardens Lawn Patio Weddings Parties Indoor and Outdoor (Colorful) Water--resistant----This solar string lights suitable for Indoor & Outdoor Eco Saving----Built-in rechargeable NI-MH battery,recharge and light up automatically Easy to Operate & Install----Simple operation with Two switch and one Stake Efficient Absorption & Conversion----Adjustable solar panel design for direct sunlight in Summer and Winter Long working time----With a full charge of 6-8 hours, the Fairy lights will provide lighting for 8-10 hours