Tube arms enlarge the illumination area. Stretch the LED arms and rotate struts for optimized lighting direction and position: Tilt the base joint and upper joint to find the perfect angle for your sheet music.NULED desk lamp is black polished with sensitive touch control panel. The USB output on the side can charge your mobile devices at side (it is recommended to dim or turn off the lamp if you want to charge your phone faster). This upgraded version comes with 6ft (or 180cm) microUSB cable and 5V 2A USB charger included. Foldable and portable for outdoor camping/party powered by optional power bank.