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 new dye ink into the ink cartridge or use other brands or compatible inks to make it usable. Usage precautions: When the ink shows 99%, do not repeatedly attempt to restore it, otherwise it may lock the chip. 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 may 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 proper contact with the probes. Product Name: Maintenance Chip Resetter Part No.: C9345/C12C93459 Port: Type-C Compatible 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-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 Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the actual product. Measurement may vary by +/- 1-3 cm.