Early ’80’s MOOG ROGUE, serial number 5731. Plays in Auto Trig mode only and it will need a tune up for full function. Cosmetically two keys have issues (see photos) Lower C is bent and Upper C has a cigarette burn. The Moog is a blast to play and has served me well. You can use another sound source, plug into the Moog and utilize the filters for increased monophonic capabilities, but I found it very handy when our bass player didn’t show up and I used it as a killer bass! Of cou...rse an analog synthesizer has abilities that are hard to replicate, based on the user’s ability of course. Comes with Power Pack and Owners Manual.