BESWILL Auto on/off:16.feet solar string lights with optical technology,auto off at sunrise to absorb solar power.Auto on at night,super bright and convenient for you.Solar panel of the solar strip lights is very efficient. Built-in Rechargeable battery:Once the solar panel absorb enough sunlight during the day,solar strip lights will work for a long time.There is no need to replace the battery. Two lights modes:Our solar string lights have two switches at the back of solar panel,one for ON/OFF,one for light modes choice-steady &flash.Just set the light modes what you like. Flexible&Cuttable:if you feel the solar string lights is too long for you,every 10 LEDs cuttable from the end,without damage the rest strips.please think twice before cutting the flexible solar strip lights,as it hard to restore the original length. Easy to install:On the back of sticky strip lights,there is a self-adhesive 3M tape,which let you easy to install and operate. This solar string lights is very suitable for indoor and outdoor activities,such as:party,BBQ,festival,holiday and so on.You also can use it decorating your garden,home,yard,wedding etc.As it waterproof and very durable.