The is a professional studio compressor and booster in compact pedal format. It can be used with your electric guitar and guitar. Simple to use yet extremely powerful. The give the gloss of a professional studio production to all your performances. It can be used both live and in the studio. Studio compressor pedal Optical analog compressor stomp box Suitable for the compression of almost all musical instrument equipment Suitable for guitar, , vocal recording, drum kit and stage karaoke Audiophile effect pedal supports unconventional compression The appearance is rounded and the damping is comfortable Specifications: Power supply: DC 9V Current drain: Less than 30mA Output impedance: 10K ohm Input impedance: 500K ohm Colour:Black Material:Aluminum Alloy Package Contents: 1 x Electric guitar compressor pedal Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.