Bonlux Touching Dimmable Flexible USB LED Light Eye-Care Reading Light Adjustable USB Desk LED Lamp for Reading/Works/Study,Office, Bedroom, School Lighting (Black) Using unique design and high technology touching switch. ON/OFF Touching Switch; 0-100% brightness dimming by long time touch; 1.5W, DC5V USB Input; 150lm Daylight 6000K; With 360 degree ratatable gooseneck & 4.2ft long USB cable; Support any USB power source: Laptop, PC, Power Bank or USB power adapter etc.