Model referred to both as "DSC-RX100M4" and just "RX100 IV"  in Sony sources, and also as "RX100IV" elsewhere.  A compact camera with a 1" Sony CMOS sensor with Exmor-RS technology and 5472 x 3648 pixels of 2.40 μm size; one in the IMX383 family I believe; same as all newer RX100 models (from IV to VII).  Lens: Carl Zeiss Vario Sonnar T* 1,8-2,8 / 8,8-25,7 mm.