Brand: LEDMART Led: 2 bright lights Full length: 11.8 inches (Neck: 7.1 inches) Weight: 0.37 pound Features: 1.Double necks with 4 High quality bright LED separated on 2 necks. 2.Battery-operated or USB bus powered. 5.First-cl??r keyboard or music book. 4.Clip or stand light for music stand, book & laptop users. 5. 3 touch-control power settings--on/brighter/off. This LED light is of fashion housing design, great lens spreads evenly on your music book or keypad. It"s an ideal lamp for night work or musician, powered by USB line-included or 3 AAA batteries-not included. It is surely your best choice of gift. 7 ?????Ñò???Ñò???Ñò???Ñò???Ñò???Ñò