HP 4100TN - Manual (Page 19)

EN Printer features and benefits 17
Expandable design
● optional paper handling accessories:
• stackable 500-sheet paper trays (up to two additional trays)
• power envelope feeder (holds up to 75 envelopes)
• duplex printing accessory (for two-sided printing)
● flash storage (for forms, fonts, and signatures)
● expandable memory (up to 256 MB)
● two EIO slots for connecting to networks or additional devices
● HP JetSend enabled
● hard disk (for job retention)