All you need to start the party is the powerfully engineered Naztech Koncert Boomstation All you need to start the party is the powerfully engineered Naztech Koncert Boomstation - just pair your smartphone or tablet and let the good times roll. Delivering the finest in audio quality and functionality, the rugged Koncert is quite simply the new standard in portable speakers. For those who demand more, the Koncert Boomstation features a built-in microphone and exclusive PowerBank for charging your devices on the go.