Advanced circuitry design.Speaker selector for 2 systems. Input Sensitivity (CD): 500 MV/47k ohmsHead phone terminalAuto power standby functionSpeaker selector and speaker terminals for two systemsBluetooth to your favorite streaming music services40 station FM/AM preset tuning; Frequency Response: 10Hz – 100kHz (0 plus/ minus 0.5 dB / 0 plus/ minus 3.0 dB)Brushed aluminum finish and simplistic designSpeaker selector for 2 systems. Input Sensitivity (CD): 500 MV/47k ohmsHead phone terminalAuto power standby functionSpeaker selector and speaker terminals for two systems