Adjustable Brightness & Color Temperature: With Etekcity LED desk lamp you can completely customize your illumination to suit your needs. Select from 4 color temperature modes-Reading, Study, Relax, Sleep; 5 adjustable brightness levels for each modeMemory Function: Remembers the last mode and brightness level you selected when turned off and on again; Timer Function: Auto-off timer aromatically shuts the lamp off after an hourEye-caring Feature: Each mode is calibrated to provide optimum lighting for each respective activity while reducing eye strain and fatigue. Whether you need lighting that stimulates concentration for studying or a softer glow for relaxation,this LED desk lamp does it all with easy-to-use touch control and provide on-flicking natural lightBuilt-in USB Charging Port: Lets you charge your smart phone, tablet, and other  electronic devices while you work, read, or study. The modern large base design also naturally fit anywhere including office, living room, studying room and bedroomSimple Operation: Touch control allows easy brightness and color temperature adjustment; 1-Year Warranty by Etekcity