E3L 5W Height Adjustable Fashion Led Desk Lamp Foldable Style, Optional Power Sources&mdash;USB or Power Adaptors, Green Multi-power sourcescharges via USB to computers or power adaptors Provides natural, non-flickering light for stress free productivity and enjoyment Adjustable-Heightfrom 8 inch to 13.5 inchVertical movement on lower arm with vertical and horizontal movement on the lampshade for greater Integral On/Off switch 1.5 Meter 5 feet power connection cable