Flexilight? It's a fine line. This booklight is so thin that when you're done reading just pop it into your book and use it as a bookmark. Though it's slender you can't miss it, with those stripy, dotty, flowery, and wordy designs. And why is it called Flexilight? Because it bends forwards at any angle, so you can position the quality LED (and its 8 lumens of light) anywhere you want it. CR2016 Batteries included.