Fishman Tone AFX DEQ, Preamp for Acoustic Guitars, ""Soft Knee"" compressor circuit, 4-Band EQ with bass, mid, treble and high-pass filter, 2 Reverb effects, 2 Delay effects, 2 Chorus effects, Flanger and tremolo effects, Foot switchable boost function, Switchable phase reversal, DI output, Dimensions (L x W x H): 136 x 241 x 56 mm@+Note: A 9 V power supply unit (e.g. article nr #409939#) or a 9 V battery is required for operation (both not included).@+@+