Function: 1. [High efficiency]-LED button on light top button switch, 3 color temperatures, 3 brightness options (total 9 gears), clip base design. 5-LED eye protection, no flicker, prevents eye fatigue. 2. [Rotate 360] the goose neck lamp has 360 flexibility so you can light where you need it. It can also be folded into a small light that is convenient to wear while traveling or traveling. 3. [Battery power] Clip work lamp with built-in battery, does not require power connection, wireless to take with you. (Please pay attention to charging when not used for a long time to preserve battery life) 4. [USB Rechargeable]-Book light can be charged via USB and comes with a universal USB charging cable, it can also be charged with USB adapters, chargers, desktops, laptops, saving waiting time. 5. [Wide use]-dimmable table lamp suitable for reading, work, study, handicraft, exhibition, camping or emergency use, children's room, dormitory, office, bedroom, living room, bathroom, etc. Specification: Article type: clamping desk lamp Material: ABS Product size: Base part size: Around. 8x4x3,5 cm 3,1x1,6x1,4 inch, height: approx. 25 cm to 9.8 inch (adjustable) Weight: approx. 115 g,4 ounces Light source: white light, warm, bright, natural light Built-in battery: 3.7 V 1000 mAh lithium polymer battery (included) Number of light beads: 5 LEDs Transmission mode: 3 color temperatures total 9-speed Control switch: top button Charging method: USB Package list: 1 x desk lamp with terminal 1 x USB cable Note: Please allow some errors caused by manual measurement. p> 1. Fully charged, press the switch at the top to turn on the light 2. Press and hold the top switch to lock the color temperature and adjust brightness with one click