ECHTPower(TM) Solar String Lights LED Original Starfish, 30 LED 21ft Fairy Decorative Light with Light Sensor, Ideal for Indoor Outdoor Festival Party Decoration Waterproof- The Solar blossom string Lights panel tested as IP65. The light enclosures are protected against water splashing from any direction. The total length of the unit is 21 ft including a 5ft lead line. Perfect for outdoor or indoor use 2 Switch Buttons- POWER ON/OFF, MODE switches (8 different modes) Eco Saving- Built-in rechargeable NI-MH battery,recharge at daytime and light up automatically at night or dark environment Long-Lasting- 1.2v 1000mAh rechargeable battery can work continuously for 8 hours once fully charged. Just replace the RECHARGEABLE BATTERY when there is not enough sunshine, then it will work Efficient Absorption & Conversion----Adjustable solar panel design for direct sunlight in Summer and Winter