MODEL e-STUDIO180CP e-STUDIO250CP e-STUDIO280CP Processor 500 MHz 600 MHz 600 MHz Print Speed - Monochrome Up to 30 Up to 25 PPM 28 Print Speed - Color Up to 8 Up to 25 PPM 28 Type Color Laser -- Color LED First Print Time - Monochrome 13 Seconds 13 Second 15 Seconds First Print Time - Color 19 Seconds 15 Second 15 Seconds Monthly Print Volume Up to 35k Up to 100,000 Pages Per Month 100K   Print Resolution 600 x 600 dpi 1200 x 1200 dpi -- Image Quality 2400 dpi 4800 dpi 2400 dpi Image Quality   Standard Paper Capacity 250 Sheets 600-Sheets 1,100 Sheets Maximum Paper Capacity 780 Sheets 3,100-Sheets 5,300 Sheets Paper Sizes -- 5.5" x 8.27" to 8.4" x 14" -- Media Sizes Letter, Legal*, A4, A5, JIS B5, Executive, Statement & Universal *Requires optional Legal Tray Letter, Legal, A4, A5, JIS B5, Executive, Statement, and Universal - (5.5" x8.27" to 8.4" x 14") 5.5" x 8.5" to 12" x 18"; Envelopes Media Types Plain Paper, Envelopes, Card Stock, Transparencies, Paper Labels Plain Paper, Envelopes, Card Stock, Transparencies, Paper Labels Plain Paper, Envelopes, Card Stock, Transparencies, Paper Labels Media Weights Up to 90 lb. Index Up to 110 lb. Index Up to 90 lb. Indes - Bypass and Drawer 1 (with Heavy Media Tray). Up to 28 lb. Bond   Interface 10/100BaseT Connection, USB 2.0 Standard / 802.11b Wireless Optional 10/100BaseT Connection, USB 2.0 Port 10/100BaseT Connection USB Port Network OS Windows® 98 SE, 2000, Me, NT 4.0, XP, Server 2003, Novell® Netware® 3.x, 4.x, 5.x, 6.x Windows 98 SE, 2000, Me, Windows NT 4.0, XP, Server 2003, Macintosh 8.6 or higher, Novell NetWare Macintosh System 8.6 or higher. Windows 98SE, NT 4.0, 2000, Me, XP, NetWare 3.x, 4.x, 5.x, 6.x Printer Language PostScript™ 3 Emulation, PCL6™ Emulation Postscript 3 Emulation, PCL6 Emulation PostScript 3 Emulation Acoustics 53 dBA Printing / 41 dBA Idle 52 dBA Printing, 34 dBA Idle 58 dBA Printing; 48 dBA Idle