A set of two guitar effects pedals: Rowin Flanger and Reverb Baby. 【Rowin Flanger】 This flanger effect pedal features COLOR, RATE, and RANGE knobs, as well as a FILTER/NORMAL switch. True bypass. 【Reverb Baby】 This multi-function reverb effect pedal features Decay and Verb knobs, and allows you to switch between multiple effect modes including Single Delay, Distortion, Flanger, Chorus, Class, Tremolo, Prairie, Church, and Wahwah. Both have been tested and are in working order. There are no noticeable scratches or stains. Please refrain from purchasing if you are concerned about minor details, as these items have been stored at home. Power supply: 9V only. Thank you.