On/Off & Color Temperature Adjustment Button.
Press 1 time-warm light(2800K), press twice-white light (6000K), press 3 times-natural light (4500K), press again to turn off.
Brightness Adjustment Button.
Press 1 time-20% brightness,press twice--40% brightness,press 3 times--60% brightness,press 4 times--80% brightness,5 press-100% brightness.
Long press for 3 seconds, the LED indicator light flashes twice, and the book light will turn off after 30 minutes.
In timer mode, press any button to release the timer