More speed. More expandability. Professional quality results. The WorkCentre 3615 is a 47 ppm black and white laser MFP. It comes standard with a 525MHz processor and 1GBMB of RAM. The standard tray holds 550 sheets with a bypass tray that holds 150 sheets. The duplex auto doc feeder holds 60 sheets. It connects via 10/100/1000Base-T Ethernet, USB 2.0. It also comes standard with automatic 2 sided printing.