User Manual: 1. Please confirm your Printer Model before placing order. 2. Before using, please tear off the plastic tape marked with pull. 3. If the printer prompt 'Non-Genuine Cartridges', please click 'Yes' or 'Continue', then the printer can go on to print. 4. Once errors message occurs which like 'cartridges can not be recognized' or 'Replace Cartridge', please wipe the cartridge's chip with rubber eraser or soft tissue, then install to try again. Warm Tips:Do printer head cleaning 1~2 times after installation can improve print quality. NON-OEM.