The COOL-ER ebook reader has 1 GB of built-in memory, allowing you to store up to 500 ebooks. This is expandable up to 4GB via SD card so that thousands can be stored. Read up to 10 novels on a single charge (8000 page turns). 6" screen with 16 greyscale levels is easy to read even in direct sunlight. Choose your font style & size and portrait or landscape options to customise your ereader to your own preferences. The COOL-ER ebook reader has a built-in MP3 player perfect for audio books & music. 2 million ebooks available including latest releases. PC and Mac compatible. Weighs only 178g. Racing Green finish.