Easy to use Just touch a button on the head, you can adjust its brightness and color temperature between 3000K-6500K. Press the button for 2 seconds: Set the color temperature to 3 levels (3000K warm light for sleeping, 4200K warm white light for relaxation, 6500K cold white light for reading). Click on the button: adjust the intensity of the light, 3 levels adjustable. LED Eye-caring Light Source Compared to old white incandescent lamps, this LED lamp has many advantages: high light output with lower energy demand, long life bulbs, no heat production, eye care, etc. Portable Design EECOO flexible reading lamp fits anywhere. Its clip-on design makes it a perfect accessory for those with limited work space. This compact LED lamp is widely used in student dormitories or as a child's bedside lamp. Specifications: Power: 3W Color temperature: 3000K-6500K Luminous flux: 50lm (Max.) Power supply: 1200mAh rechargeable battery Charging time: about 2 hours Input: Micro USB 5V / 1A Package: 1 x LED reading lamp 1 x USB cable to charge 1 x User Manual Working Widely: The reading light can be mount on desk, headboard, bedstead, office table, folder, etc. 2 Color Temperature & Eyes Caring: The clip reading lamp with 14LEDs has 2 kinds of light that can light separately or at the same time. There are 9 modes to choose to emit a cold white light (read), white of the day (work ) or warm white (rest). USB Rechargeable: The LED book light is USB rechargeable. There are red / green indication light to show the charging. And a USB cable is included in the parcel. Goose-neck and Flexible Design: The 360° rotating goose-neck creates more possibility of use situation as well as on orchestra stand, table or bed side, book and kindle digital reader, tablet keyboard etc. The large built-in 1200mAh lithium battery just need 4 hours to be full charged.