Features High Quality 5V 1-Channel Relay Module: This module offers high-quality performance with a 5V power supply and 1-channel bistable self-locking relay, ensuring reliable and efficient . Convenient Trigger Control: Easily activate the relay by clicking the trigger port to pull it in and hold, and click again to disconnect, providing convenient and intuitive control. and Long Service Life: Constructed with high-quality materials, this relay module is and has a long service life, ensuring lasting reliability for your applications. High Accuracy and Strong Stability: With high accuracy and strong stability, this relay module is easy to install and use, delivering and reliable performance for various applications. Safe Low Pulse Trigger: The trigger mode is a low pulse trigger, providing a more convenient and safer for your peace of mind. Features: 1、APPLICABLE MODEL: For HP Officejet Pro 6960 6961 6963 6964 6965 6966 6968 6970 6971 6974 6975 6978 6979 printers. 2、GOOD COMPATIBILITY: Using intelligent chip, with strong compatibility and accurate counting, can compatible with the original. 3、HIGH PERFORMANCE: Using excellent ink with low viscosity and high tension, glossy ink discharge and good stability. 4、EASY TO REFILL: This ink cartridge replacement can restore true colors, easy to refill and not easy to damage the printer. 5、INKJET PRINTING: Energy saving and environmental protection, inkjet printing with high gloss, uniform and no peculiar smell. Specification: Item Type: Ink Cartridge Material: PP Applicable Scenarios: For printing photos, test papers, documents, etc. Color: Black, Blue, Red, Yellow Models: For 903XLK, 903XLC, 903XLM, 903XLY Applicable Area: European Applicable Models: For HP Officejet Pro 6960 6961 6963 6964 6965 6966 6968 6970 6971 6974 6975 6978 6979 All in One Printer Package List: 4 x Ink Cartridges 4 x Plastic Pads Note: Please do not tear off the export film, the machine will automatically pierce it Package List 4 x Ink Cartridges 4 x Plastic Pads