Power-on confirmation has been done. There is no noticeable dirt on the main unit, but I haven't been able to fully confirm its operation!! I was able to make a black and white copy. I don't know much about it, so I also used AI to input the description. I don't think I can answer any questions. A white, compact EPSON printer/scanner/copier model. - Brand: EPSON - Model: EP-879AW - Functions: Printer, scanner, copier - Design: White color, compact design - Interface: USB port, SD card slot Thank you for viewing.