Adjust-able BRIGHTNESS -- The light is Adjust-able, simply keep pressing the tou-ch interchange for several seconds until you get the desired brightness you want. It’s gradual dimming effect. The light with energy efficient flicker-free LED lamps, provides a perfectly even illustrated surface. USB POWERED -- The light box comes with 1pc USB power cable, you can use this USB cable to connect the light pad to any 5VDC output device, such as computer, power bank or the adapter. Wide APPLICATION -- Ideal for dia-mond pain-ting, viewing slides, stenciling, 2D animation, calligraphy, embrossing, scrapbooking, copy transferring, sketching & drawing, streaming, sewing projects, stained glass, quilting stencils, film negative etc. Eyesight-protected Technology - USB powered,ultra-bright and environmentally friendly LED ensure extreme low calorific value and life span up to 50000hours. Flicker-Free&No radiation, good for your eyes especially long-hour working. EASY TO CARRY - Lightweight, ultra-thin and light pad, it can easily fit into a backpack when traveling or outgoing, so you can always take it out for use.