The Macally BOOKLIGHT is equipped with 16 LEDs and 3 different brightness levels (Dim Mid Bright) for an even distribution of light and strain-free comfortable reading. The BOOKLIGHT also features an easy to operate clamp so that you can securely clip on to any table nightstand headboard shelf desk or countertop with a thickness up to 2" (508 cm) and a bendable gooseneck making it easy to precisely redirect lighting as needed to avoid disrupting others as you read your books at night. Clamp clips securely to any surface with a thickness up to 2"/508 cm Flexible gooseneck allows you to direct light anywhere you want Touch sensor with 3 different levels of brightness: Dim Mid Bright Ultra-bright daylight brightness for comfortable reading in the dark Built-in rechargeable battery lasts up to 10 hours on a single charge.