Our persistence：1. The printing quality and processing method are consistent with the original.2. Equipped with the latest IC chip, it supports the remaining power display function.3. SIMPLEWORK has undergone comprehensive multiple print quality tests, and the ink cartridges print smoothly without clogging.4. Thoroughly tested for color strength, SIMPLEWORK prints fast-drying documents, text and crisp graphics with professional blacks and vibrant colors.5.Our products are protected by four-layer packaging to avoid ink leakage and damage caused by squeezing and falling.Toner cartridges Installation guides:Step 1: Shake gently for 5 seconds tooosen and spread the tonerpowder distribution. Step 2: Remove the orange rings fromboth sides of the toner cartridge Step 3: Insert the toner cartridgeinside the drum unit. Step 4: Insert the drum unit (with thetoner installed ) into your printer.Kind tips:1.Before placing an order, please be sure to confirm your printer model.2.Printer screen pop up ‘Non-Original Cartridge’? Please just click ‘OK’ and they will go ahead.3.When occur an error message ‘Replace Cartridge’ or 'Low ink' ? Please reinstall them and try, you can try up to 5 times. 4. Any product inquiries will be answered as soon as possible and services will be provided.