FLY BASS is a compact bass amplifier with gain, EQ, and a compressor. It is a junk item because it sometimes powers on and sometimes doesn't. It's in a state where it turns on if you half-press the power button. - Brand: Blackstar - Model: FLY BASS - Functions: Gain, EQ, Compressor, Volume adjustment - Connectors: Input, Line Out, Headphone jack Thank you for viewing.