ER CHEN(TM) {New Version 240LED 40Feet} Indoor and Outdoor Waterproof Battery Operated 240 LED String Lights on 40 Ft Long Ultra Thin Copper String Wire with Timer (Green) 240 Super Bright LED: 240 green LED bulbs on 40ft long high quality copper wire. Because of the higher density of light bulbs (each bulb only 2 inches apart), the entire string lights is brighter, having better decorative result and higher efficiency than the regular length string lights. They will light up your lawn or porch and add joyful atmosphere to your party and holiday. Battery powered Starry Lights: 6 AA batteries(not included) are required to power the light. Fresh AA batteries can last more than 1 week with continuously STEADY ON mode. Using Timer mode(6hr on, 18hr off) , they will last for more than 3 weeks. High Quality Copper Wire: The 3-Strands Copper Wire structure makes this firefly light more durable and flexible. It can be easily bended and shaped around almost anything, such as trees, plants, fences, signs, balcony and so on. IP65 Waterproof: The string lights also can be used indoor or outdoor freely. The wire parts of the string lights are fully sealed, can working under the water; the battery case has IP44 waterproof level, can working outside, but cannot sink under the water. Certification and Warranty: With the CE and FCC certificates, the safety of the lights is guaranteed. We also provide 12 monthswarranty. If you are not satisfied with the product, please don't hesitate to contact us at any time, we'll try our best to solve your issue.