The new Kindle that Amazon CEO Jeff Bezos teased last week has been officially unveiled, and it’s not a replacement for the expensive Kindle Voyage but rather an even more expensive reader called the Kindle Oasis. The $ 290 device ($ 310 without Special Offers, $ 360 with optional free 3G service) is available for preorder now and customers will begin getting them on April 27th.

All recent Kindles have been riffs on the same basic design, a 6-inch touchscreen surrounded by symmetrical bezels. That design slowly replaced the old QWERTY keyboard non-touch versions starting around 2011 or so and had completely replaced the keyboarded Kindles by the time the Kindle DX was retired a couple of years later. The Oasis changes things up again, switching to an asymmetrical design that you flip over if you want to switch the hand you’re holding it in; there’s also a raised bump on the back to make holding the reader more comfortable. At its thinnest point, the reader is 0.13 inches (3.4mm), the bump is 0.33 inches (8.5mm) thick, and the reader weighs 4.6 ounces (131g).

One downside of that lighter, thinner design is that the Oasis by itself won’t last as long as the other Kindles—Amazon says it will last about two weeks on a charge rather than a month. The good news is that the Oasis’ included charging cover allows it to last for another six weeks for a total of two months of battery life. The cover comes in black, “merlot,” and “walnut” finishes, and it adds a further 3.8 ounces (107g) to the total weight of the reader.