HEWLETT PACKARD CF237X, Black, Print technology Laser, Page yield (black and white) 25,000 pages, Operating temperature range 59 to 86°F, Storage temperature range -4 to 104°F, Operating humidity range 10 to 80% RH, Storage humidity 10 to 90% RH. HP Toner cartridges with JetIntelligence to deliver high quality pages at fast speeds, plus affordable high-yield options and innovative anti-fraud technology to help ensure the consistent HP quality you need.