HUION is THE FIRST company that builds ultra thin light boxes/light pads?? with our more sophisticated techniques you'll get a better quality item than the others</br>ULTRA THIN - Only 5.1mm of thickness?? the illumination is perfectly even?? super bright?? and flicker free; Brightness: 1100 Lux; Illuminate Uniformity 744 cd/ m2</br>GRADUAL LIGHT CONTROL - Adjust the light freely with the touch sensitive button?? simply a better way to find your ideal lighting</br>USB POWERED - Comes with a USB cable?? easily power your Huion L4S light box from any Computer?? Power Bank or USB Plug that connects directly into a wall outlet</br>PORTABLE - Sleek design with a 12-by-8 inch work surface?? light weight?? only 0.60kg?? portable carrying in a bag on the go or on a trip</br><br/>http://www.amazon.com/gp/product/B00J3NRAV2