SE Blue LED Clip On Lite Blue Body Super lightweight (just 0.4 oz!)lets you put light anywhere you want - makes a great map light Clip with wound-steel spring attaches to book cover, pocket, clothing, hat or other surface to 3/4" Fully articulating swivel-ball socket for perfect light angle and direction Super-bright high efficiency Light Emitting Diode lights for hours on 3 button-cell batteries (incl)