This Part was just pulled from a working Tascam DM-3200 Dm-4800 and is the original It is the Multi-function Encoder knob located above each channel in the middle. It is dark grey in color. it may be compatible with other models, however make sure to check before you buy. I will stand behind my listing, however again, make sure this is the correct part that you need and it will for sure work with your console. View the photos carefully. If you are unsure, please ask questions. I am more than happy to help out however I can. I will ship usually within 2 business days Via USPS. If you are in a rush, message me first and we can see about getting it out faster. I still have numerous other listings active for parts for this great console. i also have a promotion going if you purchase more, you save. Just add to your cart first and purchase all at once. Local Pickup in las Vegas is always FREE