3 Levels Dimming: Easy to use, touching switch, 3-level dimming, with the darkest light, medium light, and the brightest light It meets all your needs for lighting Power Saving: With power saving switch design, it can effectively prevent power loss and prolong battery life if not used for a long time USB Charging: The darkest light source can work for 8 hours, the medium light source can work for 5 hours, the brightest light source can work for 3 hours The charging time is 3 to 4 hours Clip Design&Flexible Gooseneck: Clip design can be clipped on the desk and book, the angle of light can be adjusted at will, the light beam can be accurately aligned where needed Non-flicker Screen &eye protection LED lamp beads: Uniform illumination, close to natural light, soft surface, almost no ghosting, long-term use won't hurt the eyes