SleekLighting LED Giant Swinging Work Desk/Table Lamp/ 3 Step Dimmer and Color Temperature Changing/ 13 W/Extendable Adjustable Arm/ 100-240- V/Metal Clamp Support/Size: 15.7x15.7x11.4 3 level dimming, color temperature changing touch control If you want to buy the base to this desk lamp search asin number -B00R896EU6 Extendable and adjustable swing arm w/ 2.5 metal desk clamp support Durable metal construction, size: 15.7x15.7x11.4 Powerful 13 W LED chip, plug UL listed, instruction manual included