Tutorial: Align the chip with the corresponding groove on the chip resetter so that the probes of the chip resetter correspond to the contacts on the ink cartridge's chip. Bring the two components together tightly. If the red light comes on, it indicates correct and good contact. After about 5 seconds, the red light changes to green, indicating that the ink chip record has been refreshed. Refill the cartridge with new ink or use compatible inks to make it functional again. Usage precautions: When the ink level shows 100%, do not repeatedly attempt to reset it, otherwise it may lock the chip. When the ink level displayed on the chip is below 15%, reset the chip immediately using the chip resetter; otherwise, the printer may display an error message. If the red indicator light continues to blink and does not change to green: Reason one: The probes of the chip resetter are not aligned with the contacts on the chip, or the contacts are dirty. Reason two: If a non-genuine ink cartridge is used, the chip may not make proper contact with the resetter. Product Name: Maintenance Chip Resetter Part No.: C9345 / C12C93459 Port: Type-C Compatible Printers: -7820, -7830, -7840, -7835, -7845, -7848, M15140, M15146, M15147, -C8000, -C8090, ET-5800, ET-5850, ET-5880, ET-16000, ET-16600, ET-16650, ET-8500, ET-8550, EC-C7000, L18050, L8050, L8168, L8180, L8188, L6550, L6570, L6580, L15150, L5150, L15158, L15160, L15168, L11160 Color: As shown Material: ABS Package Contents: 1 x Decoder Note: Light reflection and differences in display screens may cause slight variations in color between the item and the image. Measurement error is +/- 1-3 cm.