Product description Shade material: plastic Lamp holder material: PVC Size: 41 x 4 x 2 cm (expanded size) Color: black Applicable type: PC (desktop, notebook, etc.) Each LED brightness parameter: 2000-4000CBD Package content: 1 * LED clip eye protection lamp 1. USB or battery operated - The compact USB lamp uses the USB interface, can also be used with 3 AAA batteries (not included) and has an independent switch. Nice white light source. When you go online or play games at night, plug in a USB cable like this to protect your eyes and avoid fatigue. 2. Handy Clamp - Attaches to headboards, desks, and tables to provide a stable light source when needed. 3 Brightness settings Switch between low, high and medium light as required. 3. Flexible gooseneck and stable base Bendable and rotatable gooseneck to ensure the right lighting height, the right light angle and more even light. 4. Long-lasting LED The lifespan can reach more than 100,000 hours. Flexible metal bellows can be rotated in all directions, bent freely, angles adjusted and other fastening methods used flexibly and conveniently Small, light, easy to carry, very easy to put in a briefcase or folder.