FAROL Adjustable Clip-On Lamp With Twin 3-LED Rotating Lights And Bendable Neck: FL-18176 Clip jaws open to 3" - ideal for 1-1.5 inch thickness (do not use for anything over 2 inches) This unit has a battery pack inside the clip - the batteries are 3 AA are not included Each side of the lamp with rotate independently, and each has 3 LEDs plus large reflectors Bendable "gooseneck" reature - neck is 15 inches long, and moves wherever you need it Great for students, crafters, camping, study, reading or other close work