Electro-Harmonix Bass Preacher Compressor/Sustainer Pedal

CircuitAnalog Audio Connections1x 1/4" instrument input, phone type1x 1/4" instrument output, phone type ControlsVOL knobSUSTAIN knobATTACK switchBypass/Engage footswitch ImpedanceInput: 450 kOhmsOutput: 150 Ohms to 2.8 kOhms Input Sensitivity10 to +2 dBu Gain Reduction21 dB maximum Bypass SwitchTrue bypass Current Draw33 mA at 9.6 VDC Power Source9 V battery (included)9.6 VDC 200 mA power supply (available separately) Battery InfoRequired, included Battery MaterialAlkaline Battery Type9-Volt Battery Quantity1 Dimensions4.5 x 2.75 x 2.1" (11.43 x 6.98 x 5.33cm) Weight22.57 oz (640gm)