RTW TM3-Primus, Loudness Metering Device, 4.3"" Capacitive touch screen: 272 x 480 pixels, Screen layout with selectable instruments, Analog stereo RCA input (unbalanced, adjustable from -22 dBu 61 mV up to +24 dBu 12.28 V), S/PDIF coaxial input and output, Micro USB port for digital audio signals (stereo,