Anker Robot Vacuum Eufy RoboVac 11 - Junk Power turns on, but an error occurs when the switch is pressed. Even after replacing the battery, the error persists, and the red light blinks 3 times. It seems to be a problem with the filter fan, but I can't say for sure. Please purchase this item as junk. Anker Eufy RoboVac 11 [Specifications/Features] ・Quiet design ・0.6-liter large-capacity dust container ・Reinforced glass cover ・Continuous cleaning for 60 minutes on a full charge ・Weight: Approximately 2.6 kg ・Powerful suction mode of 1300Pa ・Ultra-thin design (approx. 7.2cm) for smooth cleaning under furniture ・Continuous operation for up to 100 minutes (quiet design) ・Obstacle avoidance and fall prevention function using infrared sensors ・Easy operation with remote control (scheduling possible) ◆No box or instruction manual◆ Includes: Remote control, charging station, AC adapter One used battery Spare brush, spare filter ※The remote control does not include batteries. Please prepare them after purchase. Note: I have cleaned it lightly, but please refrain from purchasing if you are sensitive to used items. Also, please look at the photos carefully and make your decision. Everything in the photos is included. Please understand that this item has been handled by other people before purchasing.