ShineMeUSB 15LED Reading Lamp LED Flexible Adjustable Gooseneck Desk Table Bed Lamp for Reading, Studying, Working, Relaxing, Night Lighting, Power Supply: USB or 3pcs AAA Batteries (NOT Included) 15pcs high quality LED lights for bright and warm light source and long life span of up tp 100,000hrs The flexible metal tube can be rotated and adjusted freely, and the light can shine at arbitrary angles Two Flexible Modes of Power Supply: USB or 3pcs AAA Batteries, small, lightweight and portable, easily fit in your backpack or briefcase LED saves more than 80% energy comparing to incandescent light; No mercury or any hazardous substance High quality LED light source of good luminance and high color rendering to better protect your eyesight