If you’ve been waiting for a killer new Windows smartphone you probably already know all about the Lumia 950 XL. Microsoft’s rumored phablet is expected to combine high-end specs with the company’s latest software, and a new leak reveals even more about the upcoming device.

An alleged photo of the Lumia 950 XL’s uncovered back panel reveals a removable 3340mAh battery. You can also see what looks like a microSD slot, along with the phone’s bulky rear camera. The image was originally shared on Weibo, though we’re seeing it courtesy of French tech blogger Steve Hemmerstoffer.

The Lumia 950 XL is expected to offer a 5.7-inch Quad HD display, a Snapdragon 810 processor, a 20-megapixel rear camera, a 5-megapixel front-facing shooter, 32GB of expandable storage, 3GB of RAM and a plastic design. Other rumored features include built-in Qi wireless charging, USB-C and an iris scanner for extra security.

Microsoft is expected to announce the Lumia 950 XL at an event on Tuesday, alongside the regular Lumia 950, which allegedly packs a 5.2-inch display, a Snapdragon 808 chip and a smaller battery with similar a design and features. There’s also the rumored Surface Pro 4 and a possible Microsoft Band 2.

That should make for a pretty exciting event, and we’ll be covering the show live from New York City starting at 10 a.m. Eastern.