Model 55UR640S3ZD , 55" , Resolution 3840x2160 , Contrast 13000:1 , 3xHDMI , 1xAudio-Out , 1xRS232 , 1xUSB 2.0 , 1xOptical S/PDIF , 1xHeadphones jack , 1xRJ45 , 2xRF-In , 1xCI Slot , Speakers , 300 mm x 300 mm , Kensington lock