【3 COLORS 3 BRIGHTNESS】The e-reader has 3 colors x 93 brightness settings, designed with 9 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 adjust low/medium/high brightness for each color mode to satisfy your needs for reading, working, sleeping and etc. 【100 HOURS BATTERY LIFE】Built in a large rechargeable battery and micro USB port, it can last up to 100 HOURS of reading without charging (at low brightness setting), and it does not 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. 【EYE-PROTECTION LED SOURCE】No negative radiation, no dizziness, no shadow, no flicker. Provides natural and soft light that won't strain your eyes even after long hours of use. Enjoy your reading time without disturbing your partner or roommate. 【360 FLEXIBLE NECK】