Warranty (1 year) For any product that may be defective, please contact us first and we will provide you with Customer Service replacement or refund Features: Circular Design: The desk lamp has a special circular design with soft and even light, flicker-free and glare-free to protect your eyes. MEMORY COLOR, DIMMING AND BRIGHTNESS MODES: White Version - No Battery: Cool White 6000k (White); 1 brightness level. Warm white/white version - 2000mah battery: warm white 3000k (yellow light) / cold light 6000k (white); 3 switchable brightness levels. 3 color temperature models: 3000K warm light (yellow light), 4000k neutral light (slightly yellow light), 6000k cold light (white light); Gradually dimmable desk lamp, 0-100% brightness. The desk lamp's memory function automatically remembers the last brightness setting used. Color temperature cannot be memorized. CLIP design : The small desk lamp has a clip that can be clipped at a thickness of less than 6cm. 360&deg;FLEXIBLE Metal Gooseneck Desk Lamp: LED Dormitory Desk Lamp The flexible metal pipe of this portable LED desk lamp can be bent to any position. any angle, durable and flexible gooseneck, allows you to adjust your table lamp with ease and direct the light where you want it. USB Charging: The version without battery can only be used directly from the USB charging cable. The battery version can be used either directly from the USB charging cable or from the battery. < br> Product Information: Type: USB Powered (No Battery) / Rechargeable (2000mAh Battery) Material: ABS Light source:18 led lamp beads Watte: 8W Luminoth flux: (tested at 34cm from light source) White-not battery life: 900lux White-2000mah:100lux-1 brightness levels/400lux-2 brightness levels/900lux-3 brightness levels Warm white-2000mah:90lux-1 brightness levels brightness/300lux-2 level brightness/700lux-3 level brightness 3 color temperature-2000mah:700lux Color temperature: 6000K-(white);3000K-(white warm);3000K/4500K/6000K-(3 color temperature) Body color: white Battery type: no battery/2000mAh battery < br>Input: DC 5V 1A Power Source: USB Cord Data Line Length: 95CM Power life :&gt; 10,000 hours Package includes: 1*Table lamp 1*USB charging cable 1*manual