Wifi connection works on the principle Weather: Time Is The Time If any of the ink cartridges is empty, nothing can be scanned, or printed, just the gray cartridge is made quickly. The device is extremely slow, taking a long time to startup and shutdown and for the price is simply not fast good Is very problematic for me as a graphic designer that when Borderless printing the images are enlarged without being asked and automatically by a percentage and is thus cut off a part of the image. On demand the hotline stated that the first time would be on Apple and then when I insisted that the driver is not well programmed, because it would at least be set in Windows that has been confirmed but not perceived as a failure Canons. I had ever done to stop buying Canon printer after they do not go along with operating system updates from Apple with the drivers, I let me just blinded by the high scanning resolution and quite good print quality. As the device adapts to the way colors the different types of paper (smooth, matte, etc.) is unclear, and for graphic designers who are used to working with color profiles a disaster. Color fastness is impossible with the device Nevertheless: if it prints or scans the result is beautiful.