The built-in rechargeable batteries store energy from sunlight and allow the lanterns to turn on automatically at dusk. Features Hanging or with a ground stake Easy to install Up to 8 hours of light Twilight sensor Technical specifications 1 bright LED each 6000 Kelvin IP44 RATING On/off switch Solar panel Approximately 8 hours of battery life with a fully charged battery. Requires 2 Mignon (AA) NiMH batteries, 450 mAh, 1.2 V (included in delivery) Dimensions: approximately 72*23*16cm (rod for hanging)