QUANS LED Dimmable Clip On Clamp Gooseneck Reading Light Power: 5 WattLight Source: LEDEmitted Color: Silver (3 Color) Dimmable,Cool White, Warm White, Cool White + Warm WhiteSpecial Features:Instant On, Dimmable, Clip on, 19.68inch adjustable long neckVoltage:5 VoltsBrightness: 270 LumenMaterial: MetalProduct Dimensions:5.24 x 4.92 x 3.62 inchesTubeSize: 19.68ich ( 50cm)Input Voltage: 5VDC (USB)Plug USB Port Clip On Reading Lights 3 Color Mods Book Light Clip on Light Strong and Flexible! Flexible Adjustable Gooseneck 19inch Super Long, Clamp Opens up to (1.18-1.34inch) width. Strong To Hold In Any Position and Provides Great Light where you want it. The lamp is suitable for reading in bed or desk,children reading,work lighting,laptop lighting,makeup lighting,etc. Multi-function Dimmer Switch Light switch3 Color DimmableBrilliance Control 3 Color Changable And 10-Level Wide Range Dimmable You can choose the color temperature and brightness that best suits you to protect. With light memory function in the case of constant electricity. USP Power Plug 5V USB (Adaptor is included) input Compatible with all standard USB devices, Easy to plug USB cable into any available USB port (laptops, USB Hubs, Power banks, chargers, etc)