Karaoke Sound Amplifier 2.1 Channel 200W*2 High Power FM USB MP3 10 Segment Audio Equalizer Car Bluetooth Amplifier

Power switch 2: Microphone jack 3: Treble adjustment 4: Microphone ba adjustment 5: Ba adjustment 6: SD socket 7: Left and right balance 8: Previous song 9: Microphone ba adjustment 10: Display 11: Pause/ playback 12: Function switch 13: USB port 14: Microphone volume adjustment 15: input audio switching 16: Total volume adjustment 17: song 18: Single song loop 19: 10-band equalizer adjustment 20: Audio input 21 : Right audio output 22: Audio input 23: Active subwoofer 24: Left audio output 25: 12V DC power supply interface 26: Power cord