INST Solar Powered 55Ft 100 LED String Lights, Ambiance Lighting, Great for Outdoor Use in Patio, Pathway, Garden, Indoor Use in Party, Bedroom Decor (White) Solar powered panel with a built-in rechargeable battery, which could be replaced with a NEW Ni-MH battery 2 different modes of glimmering : flash and steady on Overall Dimension: Approx 17M (55ft) Wide applications, great for various celebration occasions, especially for outdoor activities in the garden or lawn light-sensitive,and Swicth ON the button before charging