PRS-505 is a digital portable reading system with a 6-inch display. While compact and lightweight, the built-in memory lets the user carry around 160 volumes worth of eBook data and acts as a mobile library. Expansion slots for Memory Stick Duo inch media or SD memory cards make the device’s library potential practically limitless. The product features a svelte body design and is available in two colors, silver and dark blue. Restyled controls closely mimic paper page turns and allow for quick, intuitive navigation. A next-generation electronic paper display delivers faster response and a higher contrast ratio for easy reading, even in bright sunshine. Eight levels of gray scale provide crisp and clear text, images and graphics.