The models we are talking about are the NUC6i5SYK, NUC6i5SYH, NUC6i3SYK and NUC6i3SYH. There are two models with Intel i5-6260U and two models with Intel i3-6100U.

The NUC6i5SYK has an integrated Intel Iris 540 GPU with possibility to connect 4K screens, up to a maximum of 32 GB SODIMM DDR4 RAM and a type M.2. SSD

The mini PC mounts a full size HDMI 1.4b, a DisplayPort 1.2 with four USB 3.0 ports split evenly between the front and back, and a 10/100/1000 Mbps Ethernet. There are modules 802.11ac Wi-Fi and Bluetooth 4.1.

The NUC6i5SYH is slightly bigger than its brother which allows in addition to the M.2 SSD, a a traditional 2.5".hard drive.

The i5 flavours mirror the i3 in terms of format so the NUC6i3SYH can mount a mechanical hard drive beside the SSD M.2.

Intel's site does not mention price or an actual availability date although we suspect they are shipping now