1. The reading light has 3 colors x 3 brightness settings, designed with 3 LED bulbs and 3 brightness modes in total. Long press the switch button to choose 3 different color modes (amber, white, daylight) according to your needs and short press to set low / medium / high brightness for each color mode to satisfy your reading, working, sleeping and etc. needs. 2. Integrated in a large rechargeable battery and micro USB port, it doesn't take long to fully charge. The package contains a universal USB charging cable, so it can be charged by laptop/computer, power bank, phone charger, car USB and etc. 3. No negative radiation, no dizziness, no shadows, no flicker. Provides soft, natural light that won't strain your eyes even after long hours of use. 4. Improved 360° folding gooseneck better solves the problem of vibration and doesn't get wobbly when you move the book. 5. Its small size and compact design also make it easy to carry, The sturdy clip-on cushion can stand alone or securely attach an e-reader, book, shelf and etc, it fits in many places.