An ereader is a handheld electronic device used for reading digital books, newspapers or magazines. It typically has an e-ink display that simulates the appearance of ink on paper and allows users to read text without strain, even in bright sunlight. Ereaders are designed to be portable and lightweight, making them easy to carry around for reading on the go. Some popular ereader models include Amazon's Kindle, Barnes & Noble's Nook, and Sony's Reader.