Rechargeable Firefly USB booklight provides portable, reliable light, whenever and wherever you need it! The Firefly provides up to 50 lumens of long-lasting LED light! 360-degree swivel head ensures optimal lighting. 3 different brightness settings. Clip-on and freestanding functions. USB port for easy charging. Instructions: Press power button 1 time for LOW brightness, 2 times for MEDIUM, 3 times for HIGH, and 4 times to turn it off. Remove clip and use the USB port to charge.