MXR Bass Comp Bundle PS A1@+*Bundle offer comprising*, MXR M87 Bass Compressor, Effect Pedal, Compressor pedal for electric bass, CHT ""Constant headroom technology"" for clean and clear sound quality, Knobs for output, input, release, attack and ratio, LED chain with 10 LED for ""gain reduction"" display, Status LED, True bypass, Sturdy metal housing, Operated with 9 V battery or Dunlop ECB-003 AC adapter (sold separately, not included here), Rockboard Pedalsafe Type A1 universal, Protective Cover, Suitable for Electro Harmonix Nano series and MXR effect pedals with standard housing with 1 input and 1 output jack, Suitable for most effect pedals with housing dimensions of approx. 110 x 60 x 32 mm, With base plate for mounting on pedalboards of any manufacturer, Protects effect pedals from dirt and weather influences, Protects the settings from unintentional adjustment, Mounts effect pedals securely on almost all pedalboards, No permanent modifications required, Includes universal pedal mounting plate type A and silicone adhesive pad