This Pack includes the Fly 3 Acousitc Mini Amp, the Fly 103 Acoustic extension speaker and PSU. The Fly 103 Acoustic comes with its own built-in cable to connect it to the Fly 3 Acoustic, making it a true stereo set-up. When connected to the Fly 3 Acousitc it makes a set of portable speakers to play your music through or it can be used as a set of pc speakers or computer speakers.