Hi-fi system with an amplifier, 2 microphones & 2 speakers Amplifier with 4 mic inputs & a separately adjustable microphone section Bluetooth interface for direct playback of MP3 songs from Bluetooth enabled devices USB (Universal Serial Bus) input for direct playback of MP3 songs from USB (Universal Serial Bus) memory devices such as USB (Universal Serial Bus) flash drives & USB (Universal Serial Bus) MP3 players 16.5 cm (6.5") speakers with MDF cabinets with bass reflex design Microphones with chrome finish