"By installing a genuine Kyocera Black Laser Toner Kit (TK130) you can enjoy continued high-quality laser printing from your Kyocera FS-1300 or FS-1350 printer. You'll see a flashing red toner light when your printer is running low on toner, so make sure you order a spare cartridge. When you see a solid red toner light and no other lights, simply swap the old cartridge for the replacement and continue printing. This standard yield cartridge is packed with enough black toner to print 7,200 pages."