⊿ Two power supply modes, long lifespan: powered by 3 AA batteries (not included); or use the USB cable we provide. The service life of LED lamps exceeds 30,000 hours, or three to three hours. four times as much as ordinary halogen lamps. ⊿ Application: This jellyfish pool light has a soft and gentle light that can soothe your soul. Very suitable for bedroom, family, bar, cafe, restaurant, wedding, party. It is also a perfect lighting tool at night. May your night be full of light. It is a small night light that is very suitable for children. ⊿Energy Saving: After four hours of work, it will turn off automatically, which can save a lot of energy. You need to press the power button to restart this jellyfish tank light. Easy to use. Use, color changing light: There are 2 buttons on the top of the lid. Press ON/OFF button, it is automatic color changing mode. The lights alternate over time; Additionally, you can manually change the color of the LED display by pressing the LIGHT button.