Clip on: Brighten up with the click of a switch on the cord and perfect for Table, Desk, Bed headboard and Computers.The maximum wide of this bedside lamp for clip：2.36 inch.Free Angle Adjustable of arm and lamp holder, place your book light for best viewing.2 switches on the cord. One has three options: Warm light,off and White light. The other has two options to adjust the brightness: dim and bright.A 2-prong USB AC adapter and 5 feet cord are provided to support the clip on light. FCC listed quality saves your worry. Can be used with normal 110V household current.LEPOWER Warranty:We provide 12-month warranty for the light for quality problems. Please feel free to buy!