Fulltone CF-1 Choralflange, mono input, mono/stereo output. I bought this new and it has never left my clean, dry, basement. Its a nice warm anolog chorus or flanger with an adjustable sweep from narrow to wide. There is also volume trimmer, delay time and depth adjustments. It can go from vintage, transparent, fat (doubling) chorus or non metallic heavy flanging. It works well with an overdrive/distortion input, goes from clean to whatever you give it, also has the option of buffered or true bypass output. Includes the manual and power supply, no trades, thanks!