Product Detail : Flexibility is the hallmark of the FNL2BU1. HANDS-FREE Useful in many up-close applications, the Color : Grey Power Source : Two CR2032 Lithium Coin Cells ANSI/NEDA : 5004LC Series Lamp : One White LED Lamp Life : Lifetime Lamp Output : 6 Lumens Typical Weight : 38 grams up large extended spring clip mounts securely to books of any size. The neck bends easily and then holds its position for precision lighting. A 30 hour run time and lifetime LED lampHANDS � Large spring clip mountson many surfaces � Light where you need itwithout having to hold it(with batteries) Dimensions (mm) : 265.4 x 23.5