Bell Solar String Light Outdoor Lamp Multicolor Light for Festival Indoor Outdoor Activity Decorations Waterproof Easy Install SOLAR POWERED---Can continuously work more than 6-8 hours at night WATERPROOF----Suitable for indoor and outdoor decoration Automatically turn on at dusk and turn off at dawn. Just make sure to turn on the switch. It also could be working when there is not enough sunshine, just open the charger cover to change a AA battery( Rechargeable AA 440mAh battery included) Carved Bell Lights Decorative Lighting For Garden, Home, Patio, Lawn, Christmas Trees, Party and Holiday Decorations Wire measures: 4.8 m/ 14.7ft ; the spacing between each light: 15 cm