Jack is equipped with a very efficient 6W LED lighting. Tactile dimmer switch located on the base makes it possible to adjust the lighting intensities that correspond to different activities : working, reading, relaxing. Jack makes it possible to get on measure lighting . Jack is equipped with a USB port to charge smartphones. USB cable not included. Simple and elegant. The head in elliptical shape increases the diffusion of the lighting on the work surface. Compact and articulated it can perfectly be integrated on any desk surfaces.