Ritelite 5 LED Book Light: * 5 super-bright white LEDs last up to 100,000 hours * One-touch ON/OFF/DIMMER operation * 8" neck flexes, so you can position the light right where you want it * Magnetic base securely attaches to metal surfaces * Dual light output * Bright white light illuminates keyboard * Soft blue light reduces eyestrain * USB plugs directly into any USB Port * Connect into a detachable base * Requires 3 AAA batteries (not included)