Title: KA4 Modern Distortion Amp Simulator Effect Pedal True Bypass 9V Power Suplly Kokco KA4 Overdrive Guitar Effect Pedal Modern Sound Distortion Guitar Effect Pedal True Bypass KA4 Feature: Simulate the characteristics distortion and cabinet of a guitar amplifier Extra amount of gain boost to higher frequency for greater distortion effect. Passive 3 band EQ for nature tone True bypass hardware switching LED indicator shows status of effect and battery condition The pedal can be powered by a battery or an optional AC adaptor Material: Aluminum alloy Specifications: Input impedance: 1M Ohms Output impedance:10K Ohms Power: 9V battery or external AC adaptor (battery not included) Delivering 9V DC regulated minimum 300mA Dimensions: 121(L) x 77(W) x 48(D) mm Package Includes: 1 x KA4 Amp Simulator Effect Pedal 1 x Manual