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 will change to green, indicating that the ink cartridge chip record has been refreshed. Inject dye ink into the ink cartridge or use other brands/compatible inks to make it usable. Usage precautions: When the ink shows 100%, do not always try to restore it, otherwise, it will lock the numbers. When the ink level displayed on the chip is below 15%, you must reset the chip with a chip resetter immediately, otherwise, the ink cartridge will display an error message. 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 Epson ink cartridge is used, the chip may not make close contact with the probes. Product Name: Maintenance Chip Resetter Part NO.: C9345/C12C93459 Port: Type-C Suitable Printers: WF-7820/WF-7830/WF-7840/WF-7835/WF-7845/WF-7848 M15140/M15146/M15147/ST-C8000/ST-C8090 ET-5800/ET-5850/ET-5880/ET-16000/ET-16600/ET-16650 ET-16600/ET-8500/ET-8550/EC-C7000 L18050/L8050/L8168/L8180/L8188/L6550/L6570/L6580/L15150 L5150/L15158/L15160/L15168/L11160 Colour: As Shown Material: ABS Package Contents: 2 x Decoder