3 Light Modes &10 Brightness Levels Dimmable LED desk ring light with 3 lighting modes: warm light (3000K), warmwhite light (4500K) and white light (6500K). Each lighting mode has 10 adjustable brightness to choose. Built-in controller easy to power on/off and switch to the lighting mode to fit your various use. Eye-caring Soft Ring LightMade with premium LEDs, the LED reading lamp provides no flickering and no dazzling light, protect your eyesight and reduce your eye strain from long reading. This clip-on LED ring light provide soft adequate supplement lighting, can work perfect as computer lighting for video conference and zoom meeting. USB PoweredWorks with most devices that support USB port, such as power bank, USB charger, AC adapter, PC and Laptop with output of 5V2A (Adapter NOT Included). Please DISCONNECT the USB when not use, to avoid overheat and damage to the light or USB interface.