taotronics desk lamp 16 with 5v/2a usb port touch control

ergonomic touch button: effortlessly switch between 3 color modes (white, warm white, and natural white) and 5 brightness levels energy efficient, long-lasting bulb: class a energy saving led bulb lasts up to 50,000 hours under normal use automatic memory function: easily maintain your favorite settings; the lamp automatically selects the brightness level you chose before lightweight and adjustable: multi-joint arm for ultimate functionality; sleek, compact form for easy positioning in any environment convenient dual power supply: power via usb cable or ac adapter for use anywhere, any time