No wiring needed, powered by solar energy.LED light can keep glowing for about 8 hours a night after fully charged during the dayWaterproof, suitable for indoor and outdoor use.Great for Christmas, party or other celebration occasions. Installation and Application:1.Assembling: Put the stake onto the tube at the back.2.Installation: find a place for the lights with clear and full exposure to the sun. Insert the stake into the ground. If the ground is too hard, do not twist or hammer it with force. Failure to follow this may result in product damaged.3.Expose the solar panel to direct sunshine. Make the solar panel faces right to the noon sun.4.At the back of the solar light, there is a 3-way-switch; middle position for OFF, left and right position is for blinking or steady-on lighting performance. For initial application, we suggest the solar panel be exposed to the sun (to fully charge the battery) for 1 day or more with manual switch on.5.Push the switch to ON or FLASH. The string light now is ready to work automatically at dusk.6.Please uninstall the safety cover of switch before using.