ACM2004D-FL-GBS-D is a 20 character by 4 line LCD character module designed for embedded display applications. The module features a 5x7 dot matrix character format with cursor capability, built-in HD44780 equivalent LCD controller (Samsung KS0066), and supports both 4-bit and 8-bit MPU interface options. The display incorporates a transflective polarizer (F option) with blue mode STN fluid (B option) and top viewing direction (S option), providing excellent visibility across a wide range of lighting conditions. The module measures 98.0 mm (W) x 60.0 mm (H) x 9.5/14.0 mm (D) with a viewing area of 76.0 mm (W) x 25.2 mm (H), and operates over a standard temperature range of 0°C to 50°C with single supply voltage. This configuration is ideal for industrial control panels, instrumentation displays, and consumer electronics requiring reliable character-based information display.