Kobo Clara 2E Review: Affordable eReader Gets Big Upgrades Including Audiobook Support, Waterproof Rating, And Eco-Friendly Design The Kobo Clara 2E is an eco-friendly eReader, with a case made of over 85% recycled material. Kobo holds the price on this affordable 6-inch eReader while offering upgrades over its predecessor including an IPX8 waterproof rating, USB-C charging, 16GB storage, and Bluetooth with audiobook support.