Energizer FNL2BU1 is hands free Booklite grey & black in color and is powered by 2 x CR2032 Lithium batteries. It is useful for book reading during night when you don’t want to disturb others’ sleep. One side of its head is a manual slide switch On/Off button and the other side has a 5mm Nichia LED which provides enough light to illuminate the book. The neck is flexible for easy bending or repositioning. But usually the neck gives disturbing undesirable wrong side back push while adjusting. Its lower end contains large extended spring clip which mounts securely to the book to hold it on the required pages. The Booklite is of enough length to adjust its neck for any general size book. On the back of the clip there is its battery carrier. You just have to unscrew the screw on it to replace the batteries.