Works with most devices that support USB port, like laptop, PC, power bank, USB charger, AC adapter, and etc. Rechargeable with USB Cord. This ring light includes a built-in rechargeable battery so you do not need extra batteries. Money saved and free from annoying battery replacement. Ring Light-High Brightness with Three-Level Dimming Options. Has 36 LED lamp beads for long life. Easily adjust the brightness level by pressing single button. Enjoy your selfies, meet all your needs in different circumstances. It is the perfect daytime lighting to take away all the unflattering shadows!