Product Details: A4 LED Light Box Tracing Drawing Board Art Design Pad Copy Lightbox Features: Power Supply by USB Cable, which is 1.5M. Super Bright and Eco-friendly LED ensure extreme low calorific value and light span up to 50000 hours. Flicker-free and no radiation , it is good for your eyes especially in long-hour working situation. Owe to the Ultra-thin and light weights design, it is portable. A4-F-USB can not adjust the brightness, however A4-F-T can adjust the brightness, there are 3 levels brightness. Suitable for animation teaching, professional copy in drawing, paintings Specifications: Material:Organic glass Outside Dimension:33.7 x 23.3cm Active Area:31.1 x 23.3cm Thickness:0.4cm Power Source:5V Wattage:1.8W Light Sources:Super Bright Eco-friendly LED Net Weight:0.55KG Gross Weight:0.65KG Adjust Brightness:3 Levels brightness Note: Handle with care. Do not use sharp metal objects please to prevent scratch on work surface. Use on a security and stable platform. After use, please stored in a safe and dry place. Package Included: 1 x A4 LED Tracing Pad 1 x USB Cable 1.5M Notes: The colors may be a little different for the different monitor display. Please allow minor deviation due to manual measurement