Easy Touch Control Just touch base of the lamp to ON/OFF,which can turn on/off the light easily. Long press can adjust the brightness USB Charging reading lamp fixture comes with standard 5V/2A USB port.You can charge your mobile phone while working, studying, reading, and sleeping, which is very convenient. Eye Protection Energy-efficient 12V LED reading light creates a uniform non-flickering warm light which won't hurt your eyes. With 180flexible arm and 360rotating joint, the lamp can be adjusted to any your preferred angle Easy to InstallationFisrt,tighten bottom to lamp, check the position of the two screw holes of the base(take off lamp); And fix the base according to this orientation; then next steps attach line; last tighten lamp body Widely Application12V RV reading lamp use for caravan, van,boat,T4,T5,marine,camper,caravan,elevator light, display light,trailer, yacht and motorhome etc