Page Yield: Up to 1,250 Pages per Black C1660 Toner Cartridge, 1,000 Pages per Color C1660 Toner Cartridge, at 5% coverage on A4 paper Installation guide:Step 1: Shake the cartridge from side to side 6-8 times to make toner distribute evenly. Step 2: Remove the orange cap then put them into the printer.
1. Product under ISO9001, ISO14001 standard 2. limited warranty After-sales Service: 1. Log in Your Amazon Account > Click Your Account > Your Order > Find your order and click ‘Contact Seller'. 2. Go to the product page and click the seller's name ‘Sold by', Click ‘Ask a question' button.