The Xperia Z2 recently went on sale in the US and it appears that its successor is already in development. Today, popular gadget leaker @evleaks revealed two pictures of a device referred to as the Sony Xperia Z3. At first sight the device looks noticeably thin and it appears to have three different ports on its side (or maybe two ports and audio controls), along with some type of large round button. Although we’re not sure what the silver knob is for, considering its size, we’d guess that it could be used as a dedicated camera control.

As for the Z3’s alleged hardware, it’s rumored to feature a 5.51-inch 1080p display, a 2.4GHz quad-core Snapdragon processor, an Adreno 330 GPU, 3GB of RAM, 16Gb of storage, a 20.7-megapixel camera and Android 4.4.4 KitKat.

If in fact these are the Xperia Z3’s real specs, they’re very similar to the hardware offered by Sony’s current flagship phone, however it wouldn’t be the first time that a company released a follow up device with minimal improvements.