VANTAKOOL Kids 2-12 Year olds A4 Ultra-Thin Portable LED Box Light-up Tracing Pad,Christmas Gifts and Top Toys for Boys and Girls Ages 6, 7, 8, 9,10, 5 Adopting the latest constant current technology & backlight technology of the copy board field, no extra heat generation and high security performance Adjustable screen brightness and smart memorize, simply hold your pressing to the button till you get the ideal brightness Advanced astigmatism film as well as light transmittance material guarantees high illuminate uniformity above 90%, more advanced LED cold light source The screen brightness due to DC power supply can be at least 1/4 brighter than those of USB power supply, compact and elegant design: portable Applications: professional tracing in animation and cartoon, tattoo tracing, craft projects, fabric design, etc.