Network Interface kit(NP-400) Enables mono network scanning,scan to e-mail,scan to box,network printing and internet fax. PCL Printer kit(OP-500) GDI printer can be upgraded to a PCL printer suitable for more complex print requirements. 32MB Memory Card Upgrade the memory from 8MB(650 pages) to 40MB(3,370 pages)giving extra memory for large applications. 500 Sheets Cassette Mechanical Counter Handset