Toner Cartridge Recycling Program - Canon was the first in the printing industry to create a toner cartridge recycling program.Toner Saving Mode - When the imageCLASS MF4450 is switched into the toner saving mode, it allows for up to a 20% more economical toner usage.This results in up to a 75% reduction in energy consumption compared to conventional roller-fixing systems. On-Demand SURF Technology - On-Demand (Surface Rapid Fixing) technology uses a linear ceramic heater that heats instantly for fast warm up speeds and Quick First Prints.Energy Saving Mode - When the imageCLASS MF4450 enters Energy Saving Mode, it has a low power consumption of 3 watts of energy in Energy Saving Mode.PC Faxing - Send documents directly from your PC to a fax machine to reduce paper and print usage.4 in 1, 2 in 1 Printing - This option allows users to place multiple pages on 1 page, saving up to 75% of your paper supply.Auto-Duplexing - Using automatic 2-sided printing and copying can save you up to 50% of your paper supply.