SPACE-OVERVIEW-â-² Full reverb effect.â-² Classical hall effect.â-² True bypass.â-² Powered by AC adapter.-Knob Description-â-²REVERB KNOB This knob adjusts the volume of reverb.â-² Pay attention: Press & hold foot switch while power on, bypass mode can be selected between true bypass & buffered bypass.-Specifications-Input impedance: 1 megohm Output impedance: 10 k Power: External 9V AC power adapter Dimensions: 94 (L)x 53 (W)x 53 (D)mm Weight: 172g Note:1. Please allow 0.5-1cm differences due to manual measurement.2. Due to the light & screen difference, the items color may be slightly different from the pictures.