Advanced circuitry design Speaker selector for 2 systems. Input Sensitivity (CD): 500 MV/47k ohms Head phone terminal Auto power standby function Speaker selector and speaker terminals for two systems Bluetooth to your favorite streaming music services 40 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 design Speaker selector for 2 systems. Input Sensitivity (CD): 500 MV/47k ohms Head phone terminal Auto power standby function Speaker selector and speaker terminals for two systems