Features: 1.Stepless adjustment brightness + memory function: brightness arbitrary adjustment, and it will automatically remember the last brightness when restarting 2.Easily through 300g of watercolor paper, through white cloth, light-colored non-woven cloth, printing paper through 3-5 sheets, copy paper through 20-30 sheets 3.Flicker- & no radiation, good for yours eyes especially long-hour working 4.Thin & portable design. Ultra-thin and light weights which makes it portable 5.Can also be used as a lamp or photo album, convenient to carry 6.The LED light source is smooth and provides uniform white light distribution across the entire work 7.Professional copy in animation, cartoon, tattoo tracing, projects, fabric design, photograph and film, etc ★Specifications(A4): Material: Acrylic Light mode: 3 Mode Brightness Adjustable Size: 33.5cm * 21.5cm / 13.2 * 8.5in Thickness: 0.47cm / 0.18" Weight: 423g(approx.) ★Specification(A5): Material: acrylic Light mode: 3 Mode Brightness Adjustable Size: 240 x 150mm/9.5 x 5.9in Weight: 225 g (approx.) ★Specification(A6): Material: acrylic Light mode: 1 Mode Brightness Adjustable Size: 8.5Cm*13Cm Package size: 8.5 x 13cm / 3.3 x 5.1in Weight: 185 g (approx.) Package list: 1 x LED Tracing Light Box 1 x USB cable User manual: 1. Tear off the protective film from the front before use. 2. Our product interface is very strong, please pay attention to the USB cable interface when using it . It is forbidden to distort the USB cable, or it will cause damage, causing light on the board, poor contact of the sensor and lackluster of the product. If there is any problem, please replace the new android USB cable. 3. If the powered rear light es, it may be that the input does not match the product under normal circumstances. You can solve the problem by changing the charger, charger or computer interface.