The Redmi 4 has been rumored to sport a 5-inch 1080p touchscreen, a 13 MP rear camera with dual-LED flash, a 5 MP selfie snapper, a Qualcomm chipset with an octa-core CPU, 3GB of RAM, 32GB of storage, a fingerprint scanner on the back, and a 4,000 mAh battery. It will reportedly be available in gray, silver, and gold (with the first of those color options pictured in the teaser, we assume).
Price-wise this is set to be quite expensive compared to its predecessors, allegedly retailing for CNY 1,300 - which means $192 or €173 at the current exchange rates. Obviously though, it's still affordable enough for the specs it packs.
Xiaomi should also launch the cheaper and lower-end Redmi 4A alongside the Redmi 4, at the same event in just a couple of days. They will both run the latest MIUI version on top of Android 6.0 Marshmallow.