Handy fold-away reading lamp clips right to the top of any book, conveniently illuminating pages with a bright, clean light. Perfect for reading in bed without the need for an overhead lamp. Also doubles as a functional tabletop light, or quickly clips onto a belt or pocket to light your path. Plastic. Two AAA batteries not included. 3 3/4" x 1 1/2" x 3 3/4" high