Feature: 1. Adjustable Lighting Modes and Brightness: This LED desk lamp features three colour temperatures: warm light (3000K), warm white light (4500K) and white light (6000K). Each lighting mode includes 10 brightness levels, ranging from 10% to maximum brightness. 2. Flexible Clamp and Long Swing Arm: The robust metallic clamp can support a desk up to 2 inch thick and firmly secure the swing arm lamp in the desired position. The angle, position, and light direction can all be adjusted freely according to your needs. 3. Eye Caring: Our LED table light offers even light distribution, no glare, no ghosting and the light is soft and gentle to the eyes. The brightness can be adjusted according to your preferences, and the excellent LED beads contribute to enhanced eye guard. 4. USB Power Supply and Memory Function: Our desk lamp can be easily powered by plugging the USB cable into any available USB port (laptop, desktop, power bank, USB adapter). The lamp will remember your preferred brightness setting even after you turn it off, ensuring no disruption of power supply. 5. Broad Usability: Constructed from premium aluminum, this clip on desk lamp is sturdy, durable, stylish and suitable for a variety of settings including home, dorm, office, study, reading, etc. Specification: Item Type: LED Desk Lamp Material: Aluminum Weight: Approx. 711.00g/25.08oz Power Supply: USB Plug in 5V Light Source: White Light, Warm Light, Neutral Light Brightness Adjustment: 10% to Full Brightness Control: Button. Package List: 1 x Lamp Body 1 x Clamp Base 1 x Instruction Manual