Daffodil LEC200 USB Light Dimmable Reading Lamp with Bright LED Bulbs, Flexible Gooseneck/Plugs into Your PC or Mac's USB Port to Light-up its Keyboard and Screen. No Batteries Needed (Red) Reading Light with Dimmer Switch - Adjust the brightness to suit your need USB Powered - Connects to any PC, Mac or USB plug for instant lighting Flexible Neck - Precise and directable light source Control Light Sensor - Power button illuminates when hand is sensed Long Life LED Bulbs - Up to 80,000 hours of illumination