| Smart printing technology monitors your toner level / Outstanding color / 4,000 page yield (based on 5% coverage) / For HP LaserJet 3500/3700 series BC-20 is the mono-only cartridge for the BJC-4000 series and BJC-5500 printers. When placed in the printer, mono print speed increases. For instance, with the BJC-4200 speed increases from 3.4 pages per minute to 4.5ppm in high speed mode. This cartridge is ideal for printing long mono documents as it lasts for approximately 900 pages. | 
