The Pyle PAMP2000BT Bluetooth Digital Stereo Power Amplifier features built-in Bluetooth technology that allows you to stream audio from all of your favorite devices (smartphones, tablets, MP3 players, etc.). You can also hard-wire external devices thanks to RCA stereo inputs compatible with a wide even more external devices like TVs, computers, CD players and more. Speaker terminal binding posts allow you to connect speakers in stereo or bridge-ability modes. Front panel rotary control knob allow for easy balance and volume adjustment, along with independent speaker (A/B) channel selection, for convenient and clear audio control. The ‘auto-on’ function allows the unit to automatically activate once a signal is received by the amp.