This outdoor solar string light has four optional modes, quick flash, steady light, slow flash, pulsating light; You can switch the lighting modes according to your needs anytime and anywhere The light bulb is made of upgraded PC material, which avoids the trouble of broken glass when you use it in your backyard The service life is as long as 50,000 hours; 15 replaceable LED bulbs plus 1 spare bulb meet your daily needs; The bulbs can withstand extreme temperatures, rain, wind, and humid weather, so you can hang the patio string lights above the trees or under the roof even on rainy days The waterproof solar string lights are equipped with a solar panel and 2pcs built-in rechargeable 2000mAh batteries so that the solar powered string lights can run for 6 to 8 hours after charging; The 180-degree adjustable solar panel can maximally receive the sunlight; USB charging available in bad weather or outdoor use; Automatic shutdown function and Solar charging mode can save your 25% bills; Solar string lights outdoor don’t require sockets; it not only suits for both indoor and outdoor decoration, but also for residential, commercial, and holiday decorations Please note that after receiving the package, it needed to be charged by USB port for 8 hours before use; Also, if you have not used it for 15 days, you need to recharge the battery for further use