Display:
Equipped with a 3.0-inch TFT resistive touchscreen, the ES400 has a resolution of 480 x 640 pixels, amounting to a pixel density of approximately 267 ppi. The screen size and resolution reflect the device's focus on functional use, rather than multimedia, and the touchscreen is responsive given the resistive technology, though not as fluid as the capacitive screens that would later dominate the market.