Features: USB plug to fit anywhere - Sudden blackout? Camping outside, No electricity? Don'for t worry, Portable USB Emergency Lamp will help you out. With a mobile power or any USB port. Hook designing - Convenient with a metal wire hook for portable to hang on or take down. High quality - Day white light, bright, soft, not dazzling. Low consumption, high brightness, stable performance made of high quality materials. Super energy saving, environmental for protection. Long service lift - The bulb has low power consumption and energy saving, and has a long service life. Applicable Scene - Super bright LED USB light bulb for your camping, beach tent, travel, night market, dormitory, Emergency use. Specifications: Material: Plastic Color: White Diameter(approx.) and Power:(optional) Diameter: 5cm/ 1.97in; 3w Diameter: 6cm/ 2.36in; 5w Diameter: 6.6cm/ 2.60in; 7w Diameter: 7.7cm/ 3.03in; 9w Diameter: 9.5cm/ 3.74in; 12w Line Length: approx. 105cm/ 41.34in Power Supply: USB 5V2A Package Includes: 1x USB Light note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.