ER CHEN Battery Operated String Lights, 33 ft 100 LED Fairy Lights with Timer, Waterproof Copper Wire Lights Outdoor/Indoor Decorative Lights for Bedroom, Garden, Party, Christmas Tree (Blue) Quality AssuranceEach product of ER CHEN has been through rigorous testing before shipment, when you receive the product if you find any problems, we will unconditionally offer you a free replacement. They possess FCC and CE certificates and meet environmentally-friendly RoHS, safety guaranteed. We provide you with 12 months warranty, 60 days Money Guarantee, 7 days/24 hrs Customer Service. Battery operated string lights 100 Super bright LED blubs on 33 ft long ultra thin silver coated copper wire with 4 inches distance between LED bulbs and 20 inches lead cable between first led bulb and battery box. 3 AA batteries(not included) are required to power the lights, fresh 6 AA batteries can last more than 3 days with continuously STEADY ON mode. Using Timer mode (6 hours on, 18 hours offthey will last for more than 12 days. Function practical, easy to operateThere are only two modes of steady on and flashing, but both modes can be timed, which is 6 hours on and 18 hours off, so you don't need to wait till deep night to turn off the lights. One button handles everything. Flexible and DurableMade from high quality 3-Strands copper wires, this fairy light is durable enough to experiment with any shapes as you like. It can be easily bended and shaped around almost anything, such as trees, plants, fences, signs, balcony and so on. Completely WaterproofThe wire parts of the string lights are fully sealed, it have IP65 waterproof level, can working under the water; The battery box has IP44 waterproof level, that means it's no problem to use outdoors, but please avoid placing the battery case under water to make it more durable.