Ultra-thin and ultra-large: The light board is made of high-quality light guide plate material, ultra-thin and lightweight, only 0.2 inches. The viewing area is slightly larger than A4 size, which can accommodate multiple slides and films for simultaneous viewing and scanning. | Slide Viewer Light Pad: An ideal negative viewer for old negatives. It provides perfect backlighting for old slides and negatives, ensuring optimal visibility. 3 levels of adjustable brightness, just touch the switch to adjust. . LED light source illuminates evenly, providing ideal brightness to capture and digitize your favorite slides and negatives. Color temperature: White (10000-12000K) | Free APP: Comes with a free APP for download, which can scan negatives, black and white photos, and regular photos. It can convert slides and negatives into digital images. Edit and save photos according to your preferences, and share them on social platforms. You can also use other apps according to your preference, such as: SlideScan app (for scanning slides) and FilmBox app (for scanning negatives) | Maximize usability: can be easily used as a light box for tracing, painting, sketching, calligraphy, etc. Simple setup is perfect for children and adults! | This product is a backlight/slide viewer/negative viewer/scanning light table. By downloading and installing the scanning app on your phone, you can scan high-quality slides and negatives to save and share your memories.