... lifetime & working hoursFeature:1, Aotomatic turn on/off by light sensor: on at dusk, off at daytimeRechargeable Battery: AAA / ... indoor, after recharged by the sun light, turn on the switch, it works(4)Work principlesolar energy ... when environment turns night, after turn on the switch, the light will lighting automatically, when it is day time ... cm 10 LED Solar String Light with colorful fabric Lantern