Powered by USB, does not work with batteries It won't kill your batteries. Thanks to its USB design, you can simply use a power bank to make it a portable string light and use it anywhere you want. Note: Does not come with a USB adapter. You can plug it into your existing phone charger, then plug it into a power outlet. Timer and memory function As soon as you press the "Timer" button on the remote control, the lamp automatically turns on for 6 hours and turns off for 18 hours. You don't need to manually select your preferred setting every time you turn them back on. NOTE: Please reset the timer if you unplug the USB drive directly instead of turning it off using the buttons on the USB drive or remote control. waterproof Thanks to the IP65 standard, the light garland is protected from jets of water. It is therefore rainproof and can be installed outdoors. Please note that the USB socket must be protected for outdoor use. Flexible to bend to all shapes This rope light is soft and can be used flexibly to decorate the outline of a building, window, driveway, patio, garden, fence, etc. 'a porch, a restaurant, a club, a pool deck, a bar and more.