This multi-function effects unit allows for versatile guitar sound adjustment. Purchased on Yahoo! Auctions in July 2019. - Model: ROCKMAN SUSTAINOR - Functions: Preamp/Compressor, Gate, Distortion/Filter, Output - Connectors: Bypass, Footswitch, Volume, Channel, External Return, Effects Loop, Send, Output - Power: AC power cord, 120V, 2-pin type Description: - The power plug is a 2-pin type and can be used normally in Japan. - The GATE LED does not light up (in my opinion, this unit produces little noise, so the GATE function wasn't necessary). Other functions have been confirmed to work on both CH1 and CH2. - There is some crackling in the sliders and buttons due to aging. I don't consider it to be a critical issue, but please refrain from purchasing if you are sensitive to this. - There is a performance using this unit on Youtube: https://www.youtube.com/watch?v=GSU1SFALZXc Added! https://www.youtube.com/watch?v=j15pn1ijEwI&t=79s Thank you for viewing.