Model listed both as "DSC-RX100M3" and "RX100 III"  in Sony sources, and also as "RX100III" elsewhere.  A compact camera with a 1" Sony CMOS sensor with Exmor-R technology and 5472 x 3648 effective pixels of 2.40 μm size, one in the IMX183 family I believe (same as the DSC-RX100M2).  Lens: Carl Zeiss Vario Sonnar T* 1,8-2,8 / 8,8-25,7 mm (same as the DSC-RX100M4, DSC-RX100M5 and DSC-RX100M5a models).