The M604dn has a standard paper capacity of 600 sheets, split between a 500-sheet main tray and a 100-sheet multipurpose feeder. It includes an automatic duplexer for printing on both sides of a sheet of paper. Additional paper-handling options are available to bring the paper capacity to a maximum of 3,600 sheets. The printer can have a monthly duty cycle of up to 175,000 sheets, making it suitable for high-volume printing.
Located on the back back of the M604dn are a USB 2.0 port and an Ethernet port. Although it does not have built-in Wi-Fi, the M604dn is capable of printing from iOS and Android phones and tablets (it's both AirPrint and Mopria Alliance compatible), provided there is a wireless access point on the network. I tested the M604dn over an Ethernet connection with its driver installed on a PC running Windows Vista.
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