Check the listing for details. JOYO JF-10 Dynamic Compressor Guitar Effect Pedal - True Bypass, DC 9V and Ba.... Condition: New. Listed at 47.77 USD. JOYO JF-10 Dynamic Compressor Guitar Effect Pedal - True Bypass, DC 9V and Battery Supported ✓ Free 60 Day Returns ✓ Free Express Shipping Description: JOYO JF-10 Dynamic Compressor Guitar Effect Pedal Features: Dynamic compressor features a re-creation of the classic ross compressor, with very low noise.Adjustment knobs, sustain, attack and level. the attack adjustment is designed for bass or high-output active pickups to better suit the instruments.Even use it as a solo boost at the very end of your chain by setting the Sustain & Attack controls to taste and then setting the Level control so it's louder when it's turned on.Excellent tone electric guitar effect pedal with true bypass provide transparent tone.Whole aluminium-alloy housing classic stoving varnish finish, stable and strong. Product Details: Brand: JOYOStyle: Bass,CompressorColor: JF-10Item Dimensions LxWxH: 4.72 x 2.83 x 2.17 inchesItem Weight: 290 GramsItem Weight: 10.2 ouncesProduct Dimensions: 4.72 x 2.83 x 2.17 inchesItem model number: JF-10Batteries: 1 9V batteries required.Is Discontinued By Manufacturer: NoDate First Available: February 13, 2012Color Name: JF-10Hardware Interface: 1/4-inch AudioSignal Format: AnalogMaterial Type: Metal, AlloyMusical Style: Pop, rock, blues, jazzSize: 4.7 x 2.5 x 1.5 inchesPower Source: Corded ElectricVoltage: 9 Volts (DC)